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M Governor

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Josh V.L.

04-30-2007 09:18:53

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We use an early "50s M around for a variety of chores. Recently the motor started to race when not under load. The engine speed does not respond to position of the throttle control lever. The tractor starts great, runs smooth, no off colored exhuast.

What might be causeing the motor to race? Any simple fixes, tips or leads would be greatly appreciated.

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Josh V.L.

04-30-2007 11:45:51

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Re: M Governor in reply to Josh V.L., 04-30-2007 09:18:53

Thanks all for your comments. I will pursue your suggestions.

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Rootsy

04-30-2007 09:43:08

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Re: M Governor in reply to Josh V.L., 04-30-2007 09:18:53

are you saying that when you start the tractor it instantly races or after you work the throttle it will not return to idle? have you removed the carburetor recently?

could be that the governor to carb shaft is not in the dog in the throttle shaft of the carb. the carb is free to do as it wishes and will generally go WOT. Or if the governor shaft is binding it will go up in rpm as you work throttle but generally not go back to idle fully.

the easiest way to check for binding of the governor shaft is to loosen the 2 screws on each end (governor and carb) and see if that helps. always tighten the 2 screws at the governor last.

If this is not the case... gonna have to go inside the governor and take a looksee. A couple of things it might be in there...

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Josh V.L.

04-30-2007 09:52:53

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Re: M Governor in reply to Rootsy, 04-30-2007 09:43:08

Rootsy, initially the tractor will idle, after raising throttle to do work, and then returning throttle to idle the engine will continue to race, at what sounds to be wide open throttle.

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BF8690

04-30-2007 11:11:01

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Re: M Governor in reply to Josh V.L., 04-30-2007 09:52:53

Check the weights in the governor. The are held in with pins, which can bend or wear over time, and they may be getting stuck. Also, the linkage that controls the butterfly on the carb could be sticking.

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