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Hsk70 service manual
The first letter designation in a model number indicates basic type of engine. The number designations following the letter indicate the horsepower or cubic inch displacement. The last three numbers of the specification number indicate a variation to the basic LEV B D engine specification.
Engine Family: Engine Tracking Information 3. New short blocks are identified by a tag marked S. Short Block Horizontal or S. Short Block Vertical. Tecumseh strongly recommends the use of fresh clean unleaded regular gasoline in all engines. Unleaded gasoline больше на странице cleaner, extends engine life and promotes better starting by reducing build-up of combustion chamber deposits.
Leaded fuel may be used in countries where unleaded fuel is not available. Use a clean, high quality detergent oil. Be sure original container is marked: A. The use hsk70 service manual multigrade hsk70 service manual may increase oil consumption under high temperature, high load applications.
Change the oil after the first two 2 hours of operation and every 25 hours thereafter, or more often if operated under dusty or dirty conditions, extreme temperature, or high load conditions.
Oil Check. Check the oil each time the equipment is used or every 5 hours. Position the equipment so the engine is level when checking the oil. Oil Change Procedure: Locate the oil drain plug. On some units this plug is узнать больше below the deck through the bottom of the mounting flange.
Other units drain at the base of the engine above the deck or frame. If access to the drain plug accuweather for windows 10 restricted by the equipment hsk70 service manual may be necessary to drain the oil by tipping the mower in a position that would allow the oil to drain out of the fill tube. On units that the drain plug is accessible, remove the plug and allow the oil to drain into a proper receptacle. Always make sure that drain oil is disposed of properly.
Once the oil is drained, reinstall the plug and fill the engine with new hsk70 service manual to the proper capacity. The following is a minor tune-up procedure. When this procedure is completed, the engine should operate properly. Further repairs may be necessary hsk70 service manual the engine's performance remains hsk70 service manual.
Service or replace the air cleaner as needed. Inspect the level and condition of the oil and change or add oil as required. Remove the blower housing and clean all dirt, grass or debris from the intake screen, cylinder head, cylinder cooling fins, carburetor, governor levers and linkage. Make sure the fuel tank, fuel filter and fuel line are clean.
Replace any worn нажмите чтобы перейти damaged приведенная ссылка springs or linkage. Make the proper governor adjustments and carburetor presets where required. When replacing the spark plug, consult the parts breakdown for the proper spark plug to be used in the engine being serviced. Set the spark plug gap to. Tighten the spark plug to 15 foot pounds of torque Make sure all ignition wires are free of abrasions or breaks and are properly routed so they will not rub on the flywheel.
Properly reinstall the blower housing, gas tank, fuel line and air cleaner assembly if removed. Make sure all remote cables are properly adjusted for proper operation. See chapter 4 under "Speed Controls and Linkage". Reinstall the spark plug wire, add fuel and oil as necessary, and start the engine. Gasoline can become stale in less than 30 days and form deposits that can impede proper fuel flow and engine operation.
Hsk70 service manual prevent deposits hsk70 service manual forming, all gasoline must be removed hsk70 service manual the fuel tank and the carburetor. An acceptable alternative to removing all gasoline is adding a fuel stabilizer to the gasoline. Fuel stabilizer such as Tecumseh's Part No. Always follow the mix ratio found on the stabilizer как сообщается здесь. Run the engine at least 10 minutes after adding the stabilizer to allow it to reach the carburetor.
Remove all gasoline from the fuel tank by running the engine until hsk70 service manual engine stops, or by draining the fuel tank by removing the fuel line at the carburetor or fuel tank. Be careful not to damage the fuel line, fittings, or fuel tank.
Drain the for windows 10 mobile by pressing upward on the bowl drain if equipped which is located on the bottom of the carburetor bowl. On carburetors without a bowl drain, the carburetor may be drained by loosening the bowl nut on the bottom carburetor one full turn. Allow to completely drain and retighten the bowl hsk70 service manual being careful not to damage the bowl gasket when tightening.
If "Gasohol" has been used, complete the above procedure and then put one half pint of unleaded gasoline into the fuel tank and repeat the above procedure.
If Gasohol is allowed to remain in the fuel system during storage, the alcohol content will cause rubber gaskets and seals to deteriorate. Change Oil: Hsk70 service manual the oil has not been changed recently, this is a good time to do it. Oil Cylinder Bore: 1. Disconnect the spark plug wire and ground the wire to the engine. Cover the spark plug hole with a страница towel.
Crank the engine over slowly several times. Install the spark plug and connect the spark plug wire. Clean Engine: Remove the blower housing and clean all dirt, grass or debris from the /46633.txt hsk70 service manual, cylinder head, cylinder cooling fins, carburetor, governor levers and linkage. The air cleaner is the device used to eliminate dust and dirt from the air supply.
Filtered air is necessary to assure that abrasive particles are removed before entering the carburetor and combustion chamber. Dirt allowed into the engine will quickly wear the internal components and shorten the life of больше информации engine.
Tecumseh engines use either a polyurethane or a paper- type air filter system. A polyurethane pre-cleaner or a flocked COVER screen may be used hsk70 service manual conjunction with the main filter. Extremely dirty conditions may require more frequent filter cleaning or replacement. Air is filtered through the pre-cleaner or flocked hsk70 service manual if equipped and the polyurethane or paper filter element.
Pre- cleaners or flocked screens provide additional air cleaning capacity. The cover holds the filter element and prevents large debris from entering the filter element. The paper or polyurethane filter element is the main filter to trap dust and dirt. Dry-type paper elements have Autodesk sketchbook designer 2012 free download free download treated paper folded for increased surface area and rubber- like sealing edges.
The polyurethane filter uses hsk70 service manual oil film to trap fine particles found in dust. A dirt restricted or an oil soaked element will cause noticeable performance problems.
A polyurethane element may be cleaned following the service procedure listed under "Service" in this chapter. A paper- type air filter should only be действительно. audio hijack 3.5.5 license key free download герои. A paper-type element cannot have an oil film present on the paper.
Follow the procedure listed in the "Service" section of this chapter for replacement. Re-try the engine after filter replacement or ссылка на продолжение. Hsk70 service manual on the polyurethane element cleaning and oiling is recommended every three months or every twenty five operating hours, whichever comes first.
Extremely dirty or dusty conditions may require daily cleanings. The paper filter element should be replaced at least once a year or more frequently if operated in dusty or dirty conditions. Unlock the tabs or remove the screws, wingnuts or snaps holding the air cleaner cover in place. Remove the hex nuts holding the element down if equipped. Подробнее на этой странице nuts are supplied with a new filter and MUST be used for proper sealing.
Remove the old element and the polyurethane pre- cleaner if equipped. Clean the inside of the cover and body, remove the old gasket between the carburetor and the air cleaner assembly. Reinstall the air cleaner assembly using a new gasket. Use the reverse procedure for reassembly. This type of air filter can be serviced when restricted with dust or dirt. Wash the filter or pre-cleaner in a liquid detergent and water solution until all the dirt is removed.
Rinse in clear water to remove the detergent solution. Squeeze the element do not twist to remove the excess water. Wrap the element in a clean cloth and squeeze it do not twist until completely dry. Re-oil the element by applying hsk70 service manual oil and squeezing it vigorously to distribute the oil. Roll the element in a cloth hsk70 service manual squeeze it do not twist to remove the excess oil.
Clean the air cleaner housing and cover being careful not to allow dirt to fall into hsk70 service manual carburetor or intake pipe. Paper type air filter elements can only be serviced by replacement. Do not attempt to clean a paper filter element.
- Tecumseh | HSK70 Service Repair Workshop Manuals
If no or weak spark, see Chapter 8 under "Testing". Visually inspect the spark plug for a wet condition indicating the presence of gasoline in the cylinder. If the spark plug is dry, check for restrictions in the fuel system before the carburetor. If the spark plug is wet, continue with step 7. Check to see if the fuel cap vent is open.
With a proper draining receptacle, remove the fuel line clamp on the carburetor fuel inlet and pull the fuel line off the fitting to examine the fuel flow and fuel condition.
Remove the air cleaner element or air cleaner assembly to visually check that the choke shutter completely closes or check to see if fuel comes out from the main nozzle during priming. If the fuel flow is adequate and no fuel is evident during priming, the carburetor will need to be removed for service. The engine may be flooded by a restricted air filter, carbon shorted or defective spark plug, excessive choking or over priming, improperly adjusted or defective carburetor, or the wrong ignition timing.
Install the spark plug and high tension lead and retry starting the engine. If the engine floods and fails to start, the carburetor may require service. The idle on an emission is metered using a threaded restrictor see Illustration.
Proper torque of this screw is critical and should be torqued to in. When the restrictor is placed in the idle circuit passage it is capped with a tamper resistant plastic cap. Tampering is considered the rejetting or modification through resizing of the jet. If the jet is removed for cleaning it must be recapped to prevent tampering when it is re-installed.
Before adjusting any mixture screws the necessary carburetor presets should be made. Check for the proper governor adjustments as outlined in Chapter 4. Identify the correct carburetor model and manufacturer to find locations of the high and low speed adjustment screws. Check the throttle control bracket for proper adjustment allowing a full choke shutter position. See Chapter 4 under "Speed Controls and Linkage". Check to see if the normal maintenance procedures have been performed oil changed, fresh fuel, air filter replaced or clean.
Consult microfiche card 30 to find the correct R. Start the engine and allow it to warm to operating temperature. The carburetor can now be adjusted. All adjustments should be made with the carburetor in the operating position. Turn both the main and idle mixture adjusting screws in clockwise until finger tight. Now back the mixture screws out counterclockwise to obtain the pre-set figure in the chart shown at right.
From the recommended preset position, turn the main mixture adjustment screw in clockwise slowly until the engine begins to run erratic lean. Note the position of the screw. Now, turn the screw out counterclockwise until the engine begins to run erratic rich. Turn the screw in clockwise midway between these two positions. This will be the best setting, diag.
Adjust the idle mixture screw following the same procedure used to adjust the main mixture adjustment screw. Recheck the high and low R. Note or mark the high and low mixture adjusting screws to aid in reassembly if applicable. Remove the high speed adjusting screw, bowl nut, and float bowl.
Remove the idle mixture screw assembly. Note the position of the spring clip on the inlet needle and float, the long end of the clip must face toward the choke end of the carburetor. Remove the float hinge pin with a needlenose pliers. Some carburetors use a float dampening spring to aid the inlet valve in maintaining a steady position during rough service applications. Note the position of the hooks before removing the float hinge pin diag.
Remove the float, clip, and inlet needle. Remove the inlet needle seat using the Tecumseh carburetor tool as shown. Push the hook through the hole in the center of the seat to remove it. Remove the throttle shutter, throttle shaft, choke shutter, springs and choke shaft by removing the screw s that attach the throttle or choke shutter to the shaft inside the air horn.
Remove the primer bulb if equipped by grasping it with a pliers and pulling and twisting out of the body. Remove the retainer by prying and lifting it out with a screwdriver. Do not re-use the old bulb or retainer diag. Some Tecumseh float style carburetors have a damper spring which is installed as shown, diag.
Remove all welch plugs if cleaning the carburetor. Secure the carburetor in a vise equipped with protective jaws. Drive the chisel into the plug to pierce the metal, then push down on the chisel to pry the plug out of the hole diag. Note the direction of the inlet fitting. If necessary the inlet fitting can be removed. See page The main nozzle on Series 8 and Series 9 carburetors can be removed by pressing the tube outward from the venturi thru the center leg. This nozzle is non-metallic and has an "O" ring seal on the top and bottom end of the tube.
Do not remove a main nozzle that is made of brass from any Tecumseh carburetor. These are pressed in at the factory to a specific depth. When removing the nozzle, the top "O" ring may not come out with the tube. The "O" ring must be removed and placed on the nozzle before it is placed back into the center leg or it will not seal properly, diag.
Servicing the standard series eleven and bridged model. When servicing the series eleven DO NOT soak it in dipping type carburetor cleaners, use only spray cleaner or standard solvent tank cleaners. Proper cleaning requires removal of both welch plugs and cleaning of the restictor s as equipped.
The standard series eleven has one restictor in the extended prime well as shown diag. The Bridged series eleven has an additional restrictor on the idle leg of the carburetor as shown diag. Both are cleaned using spray carburetor cleaner, compressed air and soft tag wire no larger than.
The main nozzle on some Walbro carburetors are removable for service. If you remove it, a service nozzle with the under cut fuel passage must be installed or problems will occur diag. Remove the screws holding the diaphragm cover on.
Remove the cover, gaskets, and diaphragm noting or marking the sequence or location to aid in reassembly. NOTE: If a "F" designation on the choke end of the carburetor is present, place the diaphragm on first, then the gasket and cover. If no "F" is present, the gasket goes first. Note or mark the high and low mixture adjustment screws. Remove the screw assemblies. Note or mark the action of the choke and throttle shutters and the hook points of the choke or throttle return spring or seal retainer springs located on the top of the choke or throttle shaft.
Remove the throttle shutter, throttle shaft, choke shutter, springs and choke shaft by removing the screw or screws that attach the throttle or choke shutter to the shaft inside the air horn. Note and mark the direction of the inlet fitting.
If necessary the inlet fitting can be removed by pulling with a pliers or vise. Some diaphragm carburetors have a strainer as an integral part of the fuel fitting.
If the strainer is lacquered or cannot be cleaned, the fitting must be replaced. Drive the chisel into the plug to pierce the metal, then push down on the chisel to pry the plug out of the hole. Clean all parts with a solvent and install a new kit which consists of a coil spring, gaskets and diaphragms diag. To check the float height, hold the carburetor in an upside down position.
Remove the bowl nut, float bowl, and "O" ring. The float must just touch the carb tool. If the float is too high or too low, adjust the height by bending the float tab accordingly.
If the required adjustment is minor, the tab adjustments may be made without removing the float and carefully inserting a small bladed screwdriver to bend the tab. Float sticking can occur due to fuel deposits or when the fuel tank is filled for the first time, this condition can be quickly corrected by loosening the carburetor bowl nut one full turn.
Use compressed air and soft tag wire to clean internal carburetor passages. To do a proper cleaning job, the welch plugs must be removed to expose the drilled passages. NOTE: The nylon check balls used in some diaphragm carburetors are not serviceable. Nylon can be damaged if subjected to harsh cleaners for prolonged periods. Throttle and Choke Examine the throttle lever and shaft, choke lever and shaft, and carburetor body at the bearing points and holes into which the linkage is fastened, and replace if worn or damaged.
Any looseness in these areas can cause dirt to enter the engine and cause premature wear. If dust seals are present, these should be positioned next to the carburetor body. The tip and tapered surface of the needle must not show any wear or damage at all. If either is worn or damaged, replace the adjusting needle. Tension is maintained on the screw with a coil spring. Examine the tapered surface of the high speed mixture needle.
If the tapered surface is damaged or shows wear, replace the needle non-emissioned. Some Tecumseh carburetors use serviceable jet main nozzles. These are identified as being non-metallic. Fuel Bowl Retaining Nut The retaining nut contains the transfer passage or metering jet through which fuel is delivered to the high speed and idle circuit of the carburetor. If a problem occurs with the idle circuit, examine the small fuel passage in the annular groove in the retaining metering nut.
This passage must be clean for the proper transfer of fuel into the idle metering circuit. Torque retaining nut to 50 in.
There are two different types of bowl nuts that are used on adjustable main, float style carburetors. One type has one fuel metering port at the bottom of the nut, and the other has two fuel inlet ports at the bottom of the nut. This difference relates to calibration changes to the carburetor and is dependent on the application diag. The fuel inlet ports must be free of any debris to allow proper fuel flow. Clean with solvent or carburetor cleaner. Examine the float for damage.
Check the float hinge bearing surfaces for wear, as well as the tab that contacts the inlet needle. Replace any damaged or worn parts. The needle and seat should be replaced if any fuel delivery problems are experienced flooding or starvation.
Sealing problems with the inlet needle seat may not be visible, so replacement is recommended. Diaphragms, Pulse Pumps, and Primer Bulbs Inspect diaphragms, gaskets, and primer bulbs for cracks, tears, hardness or brittleness. Replace if necessary. Place the welch plug into the receptacle with the raised portion up. With a punch equal to, or greater than the size of the plug, merely flatten the plug. Do not dent or drive the center of the plug below the top surface of the carburetor.
After installation of the welch plug, seal the outer diameter with finger nail polish or equivalent diag. Throttle Shaft and Plate When reassembling, it is important that the lines or lettering on the throttle plate are facing out when in the closed position. Test the operation of the throttle and return spring if equipped. If binding occurs, correct by loosening screws and repositioning throttle plate. Always use a new screw s when reinstalling the throttle shutter Tecumseh screws are treated with dry-type adhesive to secure them in place.
Choke Shaft and Plate The choke plate is inserted into the air horn of the carburetor in such a position that the flat surface of the choke is down. Choke plates will operate in either direction. Make sure it is assembled properly for the engine. Test the operation of the choke and return spring function if equipped diag.
Always use a new screw s when reinstalling the choke shutter as the screws are treated with dry-type adhesive to secure them in place. The choke shaft and plate must be in the closed position prior to tightening the screws. Hard starting may be due to insufficient choking action because of a misaligned choke plate. Correct by readjusting the choke plate to close completely.
Note the cut-out position of choke shutter if applicable. Fuel Inlet Fitting Support the carburetor body with a wood block to avoid damage to other parts. Use a bench vise or press to install the fitting squarely.
Insert the tip into the carburetor body, coat the exposed portion of the shank with Loctite grade A, then press it in until the shoulder contacts the carburetor body. Turn the high speed adjustment screw in approximately one turn into the bowl retainer nut to make an assembly diag.
On hp. Some carburetors are of the fixed main type and would not have a high speed adjusting screw. Inlet Needle and Seat On float type carburetors, make sure the seat cavity is clean. Moisten the seat with oil and insert the seat with the grooved side down and away from the inlet needle.
Press the seat into the cavity using the Tecumseh carburetor tool making sure it is firmly seated diag. The inlet needle hooks onto the float tab by means of a spring clip. To prevent binding, the long, straight end of the clip should face the air intake end of the carburetor as shown diag. On diaphragm carburetors the inlet needle and seat assembly are installed by using a socket to tighten the assembly until seated.
Be sure to drain any fuel into an approved container. Invert the carburetor and remove the float bowl. This test is best performed when the carburetor is placed upside down and level in a soft jawed vice. Lift the float and needle assembly off of the seat in order to place a drop of WD on the tip of the needle or on the seat surface. Reposition the float and needle assembly. Using the Tecumseh Leak Tester part , connect the high pressure regulator to the low pressure regulator and attach the clear low pressure air line to the carburetor fuel inlet.
Apply approximately psi of compressed air, close the gate valve and disconnect the low pressure guage from the high pressure guage.
Monitor the low pressure guage to make sure the needle shouldn't drop below 1. If the minimum of 1. Float Installation Reinstall the inlet needle and float into the carburetor. The long end of the spring or clip on the inlet needle must point toward the air intake end of the carburetor. If a float dampening spring is used, reassemble using the following steps diag. Place the float upside down. The ends must point toward the choke end of the carburetor.
Hook the inlet needle clip on the inside float tang so the clip end points to the choke end of the carburetor diag. Place the float, float spring, clip and inlet needle in position between the hinge legs of the carburetor. As the float assembly nears the hinge legs, wind the outside end of the spring so it goes to the outside of the leg counterclockwise looking from the choke end.
Install the hinge pin from the opposite hinge leg. The bowl gasket must be positioned over the end of the spring diag. Set the proper float height.
Diaphragm Assembly The rivet head on the diaphragm must always face toward the inlet needle valve. Other diaphragm carburetors have the gasket located between the diaphragm and carburetor body. Install the cover retaining screws and tighten diag. Install the float bowl by placing the detent portion opposite of the hinge pin. Make sure the deepest end of the bowl is opposite of the inlet needle.
The bowl has a small dimple located in the deepest part. The purpose of this dimple is to minimize the chances of the float sticking to the bottom of the bowl caused by stale fuel diag. On some fixed jet non-adjustable and adjustable carburetors, a fibered washer is required between the carburetor bowl and the bowl retaining nut. Occasionally, on engines equipped with the dual system carburetor, some rich starting conditions have occurred when the engine is warm.
This condition can be corrected by inserting a non-metallic spacer in the center leg of the carburetor, as shown part This spacer is designed to reduce the amount of prime charge in the main nozzle area for better starting under warm engine conditions.
It can only be used on Dual System carburetors and does not lean out the carburetor mixture, diag. Impulse Fuel Pump The diaphragms must be installed against the center body with the gaskets against the outside covers. The parts are designed so they cannot be misassembled without damage diag. To test the unit, assemble the carburetor to the engine, leaving the fuel line from the pump off. Use a different fuel tank remotely placed above the carburetor to provide gravity fuel flow to the carburetor inlet to run the engine while testing the pump.
Make sure fuel is available in both fuel tanks and that the original fuel tank's fuel line is connected to the fuel pump inlet. Place the pump outlet line in a proper draining receptacle. With the pulse line connected from the engine crankcase to the pump and the engine running, a definite fuel flow should result at the pump outlet. If the flow is erratic or intermittent, the pump needs repair or replacement. Final Checks Before reinstalling a newly overhauled carburetor, pre-set the main mixture adjustment screw, the idle mixture adjustment screw and the idle speed adjustment screw.
This Standard Service Carburetor helps to reduce dealer inventories. Standard Service Carburetors are built in both float and diaphragm versions. The parts from the original carburetor that are necessary to make a standard service carburetor are: choke shaft, shutter and spring, throttle lever and spring, fuel fitting, idle adjustment screw and spring.
If any or all of these old parts are worn or damaged, replace each part with a new service part to assure proper function and prevent engine damage. Use the diagrams on the next page as a guide to facilitate the correct installation of parts diag. Use the parts manual to obtain the same fuel inlet fitting that was installed in the original carburetor.
Install the fuel fitting in the new carburetor body in the same position as on the original carburetor. Support the carburetor body with a wood block to avoid damage to other parts.
Press it in until it bottoms out. Use a pliers or vise to remove the plastic part of the inlet fitting. Remove the choke shutter screw from the original carburetor and remove the choke shaft.
Observe the position of the ends of the choke return spring if one is present. Some chokes turn clockwise and some turn counterclockwise, note the position of the choke shaft prior to removal from the old carburetor. If a choke stop spring is present on the new carburetor and is not used on the old carburetor, cut it off with a side cutter or pull it out using a pliers. Test the action of choke shaft to make sure it moves freely and easily and does not bind in either open or closed position.
If binding occurs, loosen the shutter screw; reposition the shutter and tighten the screw. Install the throttle spring and lever on the new carburetor with the self-tapping screw furnished. If dust seals are furnished, install them under the return spring. Idle Speed Adjustment Screw Remove the screw assembly from the original carburetor and install it in the new carburetor.
Turn it in until it contacts the throttle lever. Tecumseh 4 cycle engines are equipped with mechanical type governors. Changes in engine R. The throttle is opened when the engine R. The shape of the governor weights force the governor spool to lift. The governor rod maintains contact with the governor spool due to the governor spring tension.
As the spool rises, the governor rod rotates, causing the attached outer governor lever to pull the solid link and close the throttle opening. When the engine speed decreases, the lower centrifugal force allows the governor weights to be pulled in by the governor spring. As the spool lowers, the governor rod rotates and the solid link pushes the throttle to a more open position diag.
Hunting engine R. Engine overspeeding either with or without throttle movement must be corrected immediately before serious engine damage occurs. Use the following procedure to diagnose a suspected governor problems. If the engine runs wide open faster than normal , shut the engine off immediately. Check the condition of the external governor shaft, linkage, governor spring, and speed control assembly for breakage, stretching or binding.
Correct or replace binding or damaged parts. Follow the governor adjustment procedure and reset the governor - see "Service" in this chapter. Run the engine. Be ready to shut the engine off if an overspeed problem still exists. If the problem persists, the engine will require disassembly to inspect the governor gear assembly for damage, binding, or wear.
See Chapter 9 under "Disassembly Procedure" to disassemble the engine. Remove the governor gear assembly. Repair or replace as necessary. Try to stabilize the engine R. If the engine R. See "Service" governor adjustment procedure in this chapter. If the problem persists after the governor adjustment, check the engine R. The R. If the R. Check the governor shaft or linkages for binding, wear, or improper hookup.
Check the governor spring for adequate tension. Rotate the clamp in a direction that will force the throttle shaft open and allow the governor follower arm to rest on the governor spool. Push the governor lever connected to the throttle to the wide open throttle position. Hold the lever and clamp in this position while tightening the screw diag.
The clamp must be removed from the governor rod and turned to the same position as the original engine. Hook the solid link and spring to the governor lever and position the clamp on the governor rod. Follow the above governor adjustment procedure to complete the short block governor set-up. Units built after use the normal governor set up procedure, diag. On older style governor assemblies, the retaining ring must be removed to allow the spool or gear to slide off the shaft.
Newer style governor shafts 3 - 6. If the gear requires replacement, the governor shaft will have to be removed. Grip the original spool in a vise and use a twisting and pulling motion on the flange until the spool is free. Install the new spool by starting it on the shaft and then turning the flange over. This will allow the weights to hang in the proper position. Place the spool on a solid surface and push on the flange until the spool seats. The governor weights must be in position under the spool after installation, diag.
Clamp the shaft in a vise and pound gently on the flange with a wooden or plastic mallet to remove the shaft. To install a new shaft, first assemble the gear and washer on the shaft. Start the shaft into the hole with a few taps from a soft faced hammer. Place the flange in a press with a solid piece supporting the area below the shaft boss. Press the shaft in until a shim, part just becomes snug [.
Remove the retaining ring, spool, gear assembly, and washers. Start the new shaft into the shaft boss by tapping with a soft faced hammer. Refer to the chart at right for the proper shaft exposed length. Add a drop of red Loctite and press the governor shaft to the proper depth using a press or a vise.
Wipe the extra Loctite off after installation diag. Reassemble the governor and install the retaining ring. Linkage attachment points are best recorded or marked prior to disassembly. This assures the correct placement during reassembly. On vertical shaft engines the solid link is always connected from the outermost hole in the governor lever to the throttle in the carburetor.
The link with the governor spring attached is connected between the control lever and the lower hole in the governor lever. Horizontal engines use one location non-adjustable speed control brackets. Most vertical engines use an adjustable speed control bracket mounted above the carburetor. The ignition ground out switch, idle R. Some models use the idle R. Most vertical shaft engines must have the speed control bracket aligned when installing. To align the control bracket, use the following steps.
Loosen the two screws on the top of the panel. Move the control lever to full wide open throttle position and install a wire or aligning pin through the hole in the top of the panel, the hole in the choke actuating lever, and the hole in the choke diag.
With the components aligned, tighten the two screws on the control panel. The following pages illustrate common linkage attachment. Whenever the carburetor or the governor linkage is removed or replaced, the engine R. Use microfiche card 30 or the computer parts look-up system for the correct R. Use the speed adjustment tool part as illustrated in diag. To adjust high speed, move the speed control lever to the high speed position and align the high speed pin holes.
Place the adjustment tool on the high speed tab and move the tab to achieve the correct engine speed. Move the speed control lever to the low speed position, place the adjustment tool on the low speed tab and bend to either increase or decrease to the correct speed. Place a pin through the two holes, place the equipment throttle control to the wide open position, hook the bowden cable end in the control as shown, and tighten the cable housing clamp.
In this position, the gap of. This will assure that the carburetor will go into full choke when the control is placed in the start position. Next set the non-governed idle by pushing the bottom of the governor lever away from the control brackets so the throttle lever contacts the idle speed crack screw on the carburetor.
Hold the lever in this position and turn the crack screw to RPM below the governed idle speed. If improperly adjusted, the engine could experience an over lean condition.
The idle speed is adjusted by turning the idle speed screw clockwise to increase engine R. Use tool part to adjust the high speed engine R. Place the slotted end of the tool onto the adjustment tab and bend the tab to the left toward the sparkplug end to increase engine R. NOTE: Some engines use nylon bushings on the throttle and choke linkage hook-up points to extend the life of the linkage and to enhance the stability of the governor system.
Make sure they are in good condition and in place. Place the slot on the straight end of tool number onto the high speed adjustment tab as pictured. It is designed to allow the governor to regulate the low and high speeds of the engine. The high speed is adjusted at the top screw of the override lever; to increase R.
The low speed is adjusted at the bottom screw of the override lever; to increase R. Next set the non-governed idle by pushing the bottom of the governor lever away from the control brackets, so the throttle lever contacts the idle speed screw. Hold the lever in this position and turn the idle adjustment screw clockwise to increase or counterclockwise to decrease engine idle speed. The setting on the carburetor screw should be set RPM below the governed idle setting.
If improperly adjusted, the engine could experience an over lead condition. Horizontal shaft engines use side mounted starters which can be mounted to pull either vertically or horizontally. All rewind starters except the vertical pull style turn the engine over by engaging a dog s into the starter cup attached to the engine flywheel.
The vertical pull starter engages the starter gear into the ring gear of the flywheel to turn the engine over. All starters are spring loaded to retract the dog s or starter gear when the engine speed exceeds the turning speed of the starter. The starter dog s is pinned or pocketed in the pulley hub and extends outward when the pulley's rotation forces the starter dog s to contact the ears on the retainer.
The retainer ears act as a ramp to fully extend the starter dog s. The fully extended starter dog s locks in contact with notches in the starter cup. When the engine fires and the rotational speed of the starter cup exceeds the starter pulley, the starter dog s disengages from the starter cup. The starter dog spring s returns the starter dog s to the disengaged position.
The recoil spring turns the starter pulley in the opposite direction, retracting the starter rope until the handle contacts the stop. Visually inspect the starter dog s , starter cup, retainer, springs, rope, washers, and the starter pulley for wear or breakage.
Use one of the following procedures that applies to your application, to disassemble, repair, and assemble the starter. Always consult the Tecumseh Master Parts Manual for the correct replacement parts. Consult the Tecumseh Master Parts Manual to obtain the correct part number, length, and size required. Use the following rope chart to convert a numbered rope to a fractional diameter for bulk rope use.
Some applications require longer lengths. The rope ends should be cauterized by burning with a match and wiping the rope end with a cloth while hot. Rope replacement can be done without the starter being disassembled on vertical pull starters that have "V" notches in the bracket. Use the following procedure for rope replacement. Remove the starter assembly from the engine. Turn the pulley until the staple in the pulley lines up with the "V" notch.
Pry out the staple with a small screwdriver and remove the original rope diag. Turn the pulley counterclockwise to fully wind the starter return spring until tight. Allow the pulley to unwind until the hole in the pulley lines up with the "V" notch. Hold the pulley in this position and feed the new rope through the hole and tie a left-handed knot on the rope end. Make sure the rope and knot do not protrude from the knot cavity and bind the pulley rotation.
Remove the starter handle if the retainer is a complete circle design. Remove the staple and old retainer. Slide the rope retainer into the proper position and insert the staple using a pliers. Install the starter handle and tie a left hand knot to secure the handle. After removing the rewind assembly from the engine blower housing, release the tension on the rewind spring. This can be done by removing the starter handle and carefully allowing the rope to unwind in the starter housing assembly.
Place a 1" 25 mm deep well socket under the retainer. Set the rewind on a bench, supported on the socket. The stamped steel center pin is driven out from the top, inside the center hole. Move the punch around while driving the pin to help keep the pin straight. Remove the brake spring, spring retainer, washers, and pulley assembly diag. All components in need of service should be replaced.
Reverse the disassembly procedure. The starter dogs with the dog springs must snap back to the center of the pulley disengaged position. When the rope is pulled, the tabs on the retainer must be positioned so that they will force the starter dogs to engage the starter cup.
Always replace the center spring pin with a new one upon reassembly. Place the two new plastic washers between the center leg of the starter and the retainer. New plastic washers are provided with a new center spring pin.
Discard the old plastic washer. The retainer will bend and the starter dogs will not engage the starter cup. On the stamped steel starter the center pin should be driven in until it contacts the shoulder in the starter body. Apply tension to the recoil spring by winding the pulley counterclockwise until it becomes tight, then allow the pulley to unwind until the hole in the pulley lines up with the rope eyelet in the starter housing. Install a knotted rope through the pulley and the eyelet and install the handle.
A left-hand knot should be tied on the end of the rope to secure the handle. After removing the rewind assembly from the engine blower housing, remove the starter handle by first pulling a length of rope out using the handle, tying a temporary knot in the exposed rope, and either untying the knot in the handle or prying out the staple. Untie the temporary knot and slowly allow the rope to fully retract into the starter housing and the recoil spring to fully unwind. Remove the decal from the center of the starter housing.
Use a small Phillips screwdriver or similar tool to pry the retainer legs apart and lift out the retaining wedge or steel clip on newer style starters.
Pinch the legs of the retainer together and pull on the head of the retainer to remove it from the housing. Remove the pulley assembly from the recoil housing.
If replacing the starter rope, see Step 8. Recoil starters are under heavy tension. Extreme caution should be used when working with these parts and always wear safety glasses, leather gloves and a heavy, long sleeved shirt. Replace or check that both starter dogs are in the pulley pockets and that the dog springs are hooked on the outer surface of the starter dog.
Pinch the two legs of the plastic retainer together and slightly push the retainer into the center shaft hole. Rotate the retainer so the two tabs on the bottom of retainer contact the dog on the inward side so when the rope is pulled the retainer tabs cause the dogs to flair outward. Push the retainer in until the leg prongs pop out of the center shaft. Turn the starter over and snap the locking tab between the retainer legs, replace the top decal.
The service replacement retaining wedge is spring steel. A left-hand knot should be tied on both ends of the rope to secure the handle and rope in pulley. Untie the knot in the rope and slowly release the spring tension. Remove the retainer screw, retainer cup cam dog on snow proof type , starter dog s and dog spring s , and brake spring diag. Turn the spring and keeper assembly to remove the pulley. Lift the pulley out of the starter housing.
Replace all worn or damaged parts. Assembly Procedure 1. Install the pulley assembly into the starter housing.
Install the brake spring, starter dog s , and starter dog return spring s. The starter dog spring s must hold the dog s in against the pulley. On Snow King engines the starter dog posts should be lubricated with S. Replace the retainer cup cam dog on snow proof starter and retainer screw.
Tighten to 65 - 75 in. Older models that use a 10 - 32 retainer screw can be replaced with a larger screw part A. The center screw torque on cast aluminum starters is to in. Add-on alternator starters must have the center tubular rivet replaced each time the tubular rivet is removed.
Skip this step if not applicable. If a centering pin is used, be sure to align with the crankshaft bottom pin in center screw hole. Position nylon sleeve in aligning recess in the crankshaft. With sleeve centered in crankshaft, gently push the starter in place, tighten the two mounting screws, insert and tighten the other two screws. Remove the handle and relieve the starter spring tension by allowing the rope to slip past the rope clip. Remove the spring cover by carefully removing the two small screws.
Carefully take out the spring. Remove the center hub screw and the spring hub. Lift off the gear and pulley assembly. Disassemble the pulley assembly by removing the snap ring and washer diag. Remove the starter rope if necessary. Insert the rope through the starter pulley. Assemble the gear, pulley, washer, and snap ring. Place a small amount of grease on the center shaft, place the gear and pulley into position making sure the brake spring loop is positioned over the metal tab on the bracket.
The rope clip must fit tightly onto the bracket. The raised section fits into the hole in the bracket diag. Install the hub and hub screw. Torque the hub screw to 45 - 55 in. A loose hub screw will prevent the rope from retracting. Install the return spring if necessary. A replacement spring is installed by placing the spring and its retainer over the top of the pulley and pushing the spring out of the retainer into the pulley's recessed area.
Install the spring cover and the cover screws. Wind the rope onto the pulley by slipping it past the rope clip. When the rope is fully wound on the pulley, wind the pulley assembly two additional turns to put tension on the spring.
Pull out enough rope to lock the rope in the "V" of the bracket. Remove the handle if necessary by prying out the small staple in the handle with a screwdriver. Place the starter bracket on the top of a deep well socket that is large enough to receive the head of the center pin. Use an arbor press to drive out the center pin. Rotate the spring capsule strut until it is aligned with the legs of the brake spring. This will keep the capsule in the wound position diag.
Slip the sheave out of the bracket. Squeeze and hold tightly by hand the spring capsule at the outer edge against the gear sheave. Remove the retainer pin from the strut and slowly relieve the spring tension by allowing the spring capsule to rotate slowly under control, until completely unwound. The spring capsule can now be removed from the gear sheave. Feed the new rope through the hole and tie a left- handed knot on the rope end. Make sure the rope and knot do not protrude from the knot cavity and bind the pulley rotation diag.
Wind the rope on the sheave assembly clockwise, viewing the gear from the gear side of the sheave. Reinstall the brake spring, being careful not to spread the spring more than necessary.
Install the spring capsule, making sure the starter spring end hooks on the gear hub diag. Wind the spring four full turns and align the brake spring legs with the strut as shown.
Insert the pin in the strut diag. If the starter is equipped with a locking or delay pawl and spring, make sure these are in place before grasping the gear and spring capsule assembly and sliding it into the bracket.
Make sure the legs of the brake spring are positioned in the slots of the bracket. Feed the rope end under the rope guide and hook it into the "V" notch. Remove the pin and the strut will rotate clockwise against the bracket diag. Insert the new center pin by pressing or driving the pin firmly in place.
Reinstall the starter assembly on the engine diag. The battery is part of both the starting and charging circuit. The battery should be checked before going into any extensive starter or charging system checks. If a battery has a shorted cell, overcharging can result, and the regulator or rectifier may appear to be at fault.
If a cell has an open or high resistance connection, the electric starter operation will be affected. The power source used to provide the energy to turn an electric starter motor on Tecumseh engines is either volt A. The 12 volt battery models require a charging system to maintain proper battery charge. The starting circuit includes the battery, battery cables, starter or ignition switch, safety switches, and an electric starter motor.
The charging system consists of alternator charge coils, rectifiers or diodes, regulator, ignition switch, flywheel magnets, and a battery.
All engines that have a charging system will use a combination of some or all of these features. A strong magnetic force is produced by the electrical current running through the armature windings. The armature magnetism repels the magnetism produced by the permanent field magnets of the electric starter. The repelling magnetic forces cause the armature to rotate, moving the drive pinion laterally on the splined armature shaft, meshing the starter pinion gear with the flywheel ring gear.
When the drive pinion contacts the stop at the end of the armature shaft, the pinion rotates along with the armature shaft to crank the engine.
The armature and pinion remain positively engaged until the engine fires and the flywheel rotates faster than the armature.
The greater momentum of the flywheel throws the starter pinion gear out of mesh and forces the starter pinion back to the disengaged position. After the switch is released, the starting circuit is opened and the armature coasts to a stop.
A small anti-drift spring holds the pinion in the disengaged position diag. The permanent magnets in the flywheel have a magnetic field in which the lines of magnetic force run from the North Pole to the South Pole.
As the flywheel rotates and the position of the magnets change, the direction of the magnetic field changes or alternates. The alternating coils are wound in different directions to allow current to flow as an A. This is accomplished by using a diode or rectifier diag. A single diode makes use of only one half of the A. This is acceptable in certain applications. In certain situations it is necessary to make use of the entire A. Current flows through a diode when the anode is more positive than the cathode.
The cathode end of the diode should point toward the battery when diode is used between a charging system and a battery. It does not allow the negative portion through. The chemical energy produced by the dissimilar metals of the battery plates provides a electrical potential that is used to power the electric starter or unit accessories. CONDITION: All wiring must be fully insulated between connection points, securely fastened and free of foreign material such as rust and corrosion at the connection points.
This is especially important in the use of batteries where much of the potential may be lost due to loose connections or corrosion. Remember to check the insulation on the wire. All it takes is a pin hole to "ground out" on the engine or frame. This is of special concern when moisture or water is present. This may cause the engine to run erratically or be impossible to start. Wire diameter is measured in increments of gauge numbers. As the gauge number of the wire increases, the wire diameter decreases in size diag.
The starter circuit wiring must be rated at 6 or lower gauge number. The charging circuit wiring must be rated at 16 or lower gauge number 20 amp system requires 14 or lower gauge number. The magneto circuit wiring ground circuit must be rated at 18 or lower gauge number.
Tecumseh's standard engine wiring color codes, effective August, are as follows: Code Product Yellow - Alternator A. Leads Red - Alternator D. When a magnet is moved past the coils, a current is induced in the coils. In general, the greater the number of coils, the greater the output of the alternator diag.
It is completely independent from the alternator coils. This is accomplished by using a diode or rectifier. The regulator prevents overcharging of the battery and the rectifier changes the alternating current to direct current diag.
All metals are conductors of electricity, but some are better conductors than others. Silver, copper and gold are some of the better known conductors. As the temperature of the conductor increases, the resistance increases. Some of the more common materials that are insulators are glass, plastic, rubber, ceramics and porcelain. Battery defective or not charged.
Corroded or loose terminals and connections, or wrong connections. Cracked insulation or broken wires.
A wire "grounding out" in the system. Defective switch. Operator presence system functioning properly. Check the power source using an electrical tester and follow the testers recommended procedure.
Make sure the battery meets the minimum battery voltage requirements found in the original equipment manufacturer's service manual. Check the electric starter terminal for the required voltage 12v D. Check wiring, connections, fuses, ignition or starter switch, safety switches, or solenoid for continuity using a ohmmeter or a continuity light. Remove all equipment loads from the engine. Take off all drive belts, chains, and couplers to isolate the engine from the equipment it is powering.
Try to turn the engine overusing the recoil assembly if equipped. Check for proper lubrication oil level and viscosity , starter gear and flywheel ring gear interference. If no problem is discovered, the problem is an internal failure.
If the engine binds only on the compression stroke, check the engine valve clearance per the specification table in Chapter If the valve clearance is within the specifications, the camshaft compression release may require replacement. Valve clearance not within the listed specifications will require either resetting or grinding the valve stems to obtain the proper clearance.
About Manual Adjustment Tecumseh Carburetor To buy engine parts for your Tecumseh , like an air filter, oil filter, fuel filter, spark plug, tune-up kit, or carburetor parts, you will likely need to search separately on PartsTree for your engine model To.
The screw on the bottom of the bowl is the main jet. The spring connects to the lower hole of the governor lever and lays below the solid wire, shown above, in a cross-over fashion. If it is the screw in front and underneath the carb throat that bolts to the intake manifold, it is a fuel screw. Enter your model number in the search box above or just choose from the list below.
The amount of fuel required to run the engine at full speed no-load and full speed under-load is quite diffrent. The belly of the bend will face the carburetor. Tecumseh Carburetor Hsk70 Adjustment.
Tecumseh Carburetor Adjustment Hsk If it seems rough, turn main power screw in slowly until it sounds ready to die,then turn out slowly until it starts showing some black smoke. Tecumseh manufactures a variety of small engines for use in lawn-and-garden products and in small industria. How to Adjust a Small Engine Carburetor?. Turn the engine over while looking at the underside of the carburetor.
Mount the bracket to the carburetor and then mount the carburetor to the engine. This manual covers the following models: Other illustrated Tecumseh 2-Cycle Engine, 4-Cycle Engine fins and carburetor governor levers and linkage. If it starts,let it warm up a little and run full governed speed. In this video, I show you how to tune a Tecumseh carburetor after you rebuild it.
In addition, troubleshooting fuel supply problems before making adjustments to the. Close the fuel shutoff or drain the tank. Turn the screw first clockwise as much as you can and then counterclockwise until the engine is about to stall out from too much fuel. I have an ariens snowblower with a tecumseh HSK70 engine.
It idles fine but just plain stalls under a load. Replaces Tecumseh Tecumseh hsk Adjusting a small engine carburetor is a simple job that involves adjustments to its idle speed and mixture settings. I would recommend removing and cleaning all before you adjust everything. It will categorically squander the time. Please email with the engine's spec number if you do not know your part number. There are parts used by this model.
But it sounds like the carb is plugged up. If you did not ever loosen the bold holding the shaft to the arm, and it is not loose now, then it probably is NOT out of adjustment, so do not touch it If this is not the case, then you may have a much worse problem.
On both screws, clockwise is lean and counter clockwise is rich. Hsk70 Tecumseh Adjustment Carburetor. Make sure you do not overtighten or you will damage the valve. I tried tweaking the needle adjustment on the carb. Adjust the Tecumseh carburetor by using simple steps. More than likely there is no fuel filter, Still sounds like you have a jet plugged. I have a yardman snow blower with a hs50 tecumseh engine.
Tecumseh HSK70 H70 7hp. I also briefly demonstrate how to adjust the engine spee. This engine ran short on oil and the connecting rod blew. Tecumseh Carb Repair Kit. However below, with you visit this web page, it will be suitably enormously easy to acquire as with ease as download lead Tecumseh Repair Manual Free Manuals And Guides It will. Series 1 carburetors come in a variety of styles. Complete exploded views of all the. Tecumseh engine model H60 U.
Then turn the clip darker in color clockwise also and tighten the screw. Then run up to full speed and adjust bottom vertical screw the same way. June 11, Tecumseh Carburetors Fuel Pumps. See page with Larger Image of The dual system carburetor is used on 4-cycle vertical crankshaft rotary mower engines. Shop great deals on Tecumseh Snowblower Carburetor. This makes absolutely no sense to me but it's an advisory from Tecumseh I picked up on years ago.
Carburetor Adjustment Hsk70 Tecumseh. Tecumseh Engines Troubleshooting. Tecumseh specially formulated oil is available at any Authorized Tecumseh Service Outlet. Tecumseh Carb Linkage Manual. The carb I'm replacing must not have been original. I tried tweaking it both with the drive belt engaged and disengaged. Tecumseh Snowblower Carburetor for sale. You have two adjustments you can make. R Breather Gasket Replaces Tecumseh A normal engine will reve up and. Look also to make sure that the governor arm is tightly fastened to the governor shaft and is adjusted properly.
Adjust the Carb while it is running in the open diresction first until it starts to run rough but not stall. Identify the hex-shaped adjustment screw beneath the float bowl on the Tecumseh 5. The screw on the bottom of the bowl is the high speed mixture screw.
Divide that number of turns by 2 and tighten it that many turns. Tecumseh Hsk70 Adjustment Carburetor. Carburetor Tecumseh Adjustment Hsk Difficult to adjust once cover is on except for the main jet on the bowl bottom. Be careful that the float doesn't swing down too far so the float needle can come loose. If it's pointing toward the engine side, the needle won't center correctly and may leak. Turn the adjustment screw clockwise until the needle valve is closed and seated at the bottom.
I suspect you may have some water or debris or varnish in your carb bowl or on the jets themselves though. Search: Tecumseh Hsk70 Carburetor Adjustment. A diagram of the Tecumseh hsk70 carburetor. Tecumseh Carburetor Part No.
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