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I have a vm80 8hp tecumseh engine 150092D day

I have a vm80 8hp tecumseh engine 150092D day code 70008D. The throttle shaft is worn out on the carb. I can not find a replacement carb that has both the throttle shaft and choke shaft installed.

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If you want a 'drop-in' replacement, you will HAVE to source a carb that was fitted as original equipment. Following the demise of Tecumseh's engine division, supply is limited to 'old stock', but there is fair spares aqvailability at present. A newer 'primer start' carb will fit, but you will have to remove all the choke operating mechanism. Don't fit a carb from a larger or smaller engine - the mixture will be wrong, and the engine will never run properly.

Posted on Sep 25, 2009

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You can used your old choke shaft if you can't find the exact carb

Posted on Sep 25, 2009

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I have a Robin eh 34 engine in a Simpson power washer. The engine starts and runs but wont rev much past a fast idle. Carb has been cleaned thoroughly. gas is fresh. Suggestions


Butch if carb was good and clean and linkages were re installed properly including governor, it is possible the throttle tab/lever (what linkage hooks to) is loose on the shaft that opens the throttle butter fly. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

DIY Tecumseh Snowblower Carburetor Throttle Shaft Lever Repair PART 1

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Troy-Bilt w/Tecumseh HMSK 80-110 engine. Where can I get a repair manual covering the carburetor OR a picture showing carb linkages?


There are a couple of reasons this could be happening.
1- The throttle shaft could be frozen or gummed up where the throttle shaft sits in the carburetor body.
2 - Check the top of the throttle shaft where the shaft meets the plate, if it is loose or separated it will not allow the throttle plate to move.
3 - The governor spool may be damaged internally in the engine.
Added a couple of Tecumseh manuals below.


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http://www.barrettsmallengine.com/manual/tecumsehcarburetormanual.pdf

http://www.barrettsmallengine.com/manual/tecumsehlheadmanual.pdf

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Where can I get a diagram of carb choke and throttle linkage set up?


I bought a brand new 13 hp Tecumseh on my rider,was trouble from day one,fought it tooth and nail,finally took to shop,they put a brand new Taecumseh carb on it,couldn't get it to run,went to a dinky lawn mower shop,was told the carb was not the right one,wow,they sold me a used one that looked way different,but it worked super,so try another non-tecumseh carb or fight it forever.

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13 hp tecumseh riding mower engine surges when mower is not engaged. It runs well when mower is engaged


"Govenor hunting" caused by a lean condition ,carb is starving for fuel ! Dirt in carb or water,or out of adjustment ,or leaking throttle shaft ....usually it is a plugged low idle passage,that causes this condition,and is almost impossible to remedy,but a good cleaning might help .....does it only governor hunt at low idle ? If so thats the issue !

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1 Answer

I have a 10 hs tecumseh motor on a riding mower i need an explode view of carb and linkage when start-up engine it goes wide open


Hi and welcome to FixYa, I am Kelly. I understand you have a 10 HP Tecumseh engine. There are service manuals available on line for your engine but without your engine model number it is difficult to pass you the correct one: Here is the link for the service manuals:
http://www.mymowerparts.com/pdf/Tecumseh_Service_and_Repair_Manuals

Somewhere in the list is your manual.
This is my best guess without your engine model number:
http://www.mymowerparts.com/pdf/Tecumseh_Service_and_Repair_Manuals/TECUMSEH_SERVICE%20_REPAIR_MANUAL_OHH50-65_OHHSK50-130_OHV11-OHV17_OVM120_OVRM40-675_OVRM120_OVXLC120_OVXL120_OVXL125_695244A.pdf

^-Make sure you read about Adjustments in section 1 also.

Running wide open causes:
1. Broken throttle control plate spring
2. Governor spring problem
3. Internal Governor flyweight has departed the governor gear.
4. Throttle plate (butterfly) attached to the throttle shaft in the carb throat has come off the throttle shaft.
5. Broken / missing linkage
6. Someone loosened the governor shaft bolt at the base of the governor arm and allowed the governor to get out of adjstment.

Thanks for choosing FixYa,
Kelly

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1 Answer

I have an old tecumseh 10 hp eng model vm100. with carb problem


Rigid link to the top hole on govenor arm, spring link to second hole. If engine 'hunts', try the 3rd or 4th hole. Each lower hole will take off a few rpm, but make the engine less prone to 'overshoot' the goverened speed.

If you have not disturbed the govenor arm clamp where it fixes to the shaft that goes into the engine, that should be all you have to do if you have, proceed as follows ;-

Assemble as above. With engine OFF, loosen the govenor clamp. Push the end of the govenor arm so the carb throttle is wide open. Whilst holding it there, rotate the shaft in the same direction as the arm would have rotated it if you hadn't lostened the clamp. Ensure it's rotated as far as possible (this removes ant 'lost' movement in the internal govenor mechanism.). Now tighten the clamp and release everything. Push the speed control to FAST. The throttle should open, and it will requirer about 4 OZ of force on the end of the govenor arm to close the carb throttle. This force will be generated by the govenor when the engine is started

Move the speed conrol to SLOW. Most of the tention should disappear, allowing the throttle to close with very lettle pressure on the govenor arm.

If all this behaves as described, you should be safe to start.

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1 Answer

Upon starting engine screams then idles down but doesn't have power to run snowblower


SOUNDS LIKE YOUR GOVERNOR LINKAGE IS NOT ADJUSTED RIGHT , OR YOUR THROTTLE SHAFT IN THE CARB IS BINDING.

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