engine revs high


Old 06-12-02, 06:20 PM
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Question engine revs high

I'm a bit of a novice here so bear with me. I've read a number of postings and haven't seen anything similar to my problem.
I have a lawnmower with a Techumse engine. Model # TVS100 440 14A Serial # 7047A. It starts OK but revs very high and higher than normal. When I pull back on the throttle it does not slow down until I am almost at the stop zone. (Approx. 3/4 of the way from full throttle). Any suggestions where to start looking? I'm suspecting the governor!
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Old 06-12-02, 10:36 PM
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Hello and Welcome pjk to our Do-It-Yourself Web Site and our Small Engine forum.

I would suspect the cable slipped in it's holding clamps or is totally out of adjustment. Correcting this condition may resolve the problem.

It's also possible the govenor linkage is sticking but not so likely. Check it for free play movement. Clean it if needed.

Also possible the govenor linkage is incorrectly install on the carb throttle plate if you removed the carb or made any prior or recent repairs to the carb, govenor linkages or throttle cable.

Most likely I have not covered all of the potential problems. The other resident small engine service and repair professionals may offer additional suggestions, advice & help. Check back several times for additional replies.

If you need further assistance, use the REPLY button to add any additional information or questions, etc. Using this method also moves the topic back up to the top of the list automatically.

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Old 06-12-02, 11:33 PM
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Hi pjk!

It sounds to me like a governor problem. The reason I say this is because you said it only slows down when the throttle is all the way in the slow position. This is the only position in the throttle that allows no tension on the governor spring, and the throttle return spring on the carb is able to shut the throttle. I suspect your linkage is ok since it IS able to change speeds. The governor lever on the side of the engine may have come loose from the shaft, or may have gotten knocked out of adjustment somehow. Or....and hopefully not....the governor could be damaged on the inside of the engine.
Old 06-13-02, 01:18 PM
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Thanks for the replies, Tom and Cheese. Since I haven't touched the motor at all except for the oil changes I do suspect that I will have to go into the guts of this thing. I hope tha the operation is a success. I'll keep you posted.
Old 06-16-02, 07:27 PM
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It seems that my problem has been solved. Upon your advice I checked out everthing and found that the governor linkage arm was loose and out of adjustment. Once I reset it things have been just fine. Thanks for all your input.
Old 06-16-02, 10:16 PM
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Good job! I'm glad we were able to help!

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