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The throttle keeps reving up and down wont stop moving back and forth

Tried to tighten spring no luck thanks Robin

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  • Eugene Rounds Mar 31, 2015

    Find you governor cross shaft connect coming from the throttle butterfly. Watch area as you move the throttle to full. Now loosen the retaining screw and turn the cross shaft in the same direction that move as you went to full throttle until shaft stops turning and tighten the retainin screw. Since engine is already running it probably won't turn a lot but the play does need to removed. The service for your particular would better instructions than this but this how it is basically done.

  • RobinRossiter
    RobinRossiter Mar 31, 2015

    thank you i no what u mean will give that a go cheers Robin

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Engine probably needs a static governor adjustment and possibly a carburetor cleaning. If you can hold the throttle butterfly steady by hand and the engine smooths out then it is the static adjustment that out adjustment.

Changing the spring length will cause the problem to get worse by making the governor more sensitive if shorten too much.

Posted on Mar 31, 2015

Testimonial: "thank you ,how do I do that. cheers Robin"

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Chances are itt needs a carb clean or ideally a ultrasonic clean

Posted on Apr 02, 2015

  • Neil Hancock Apr 02, 2015

    chances are it needs a carb clean or ideally a ultrasonic clean

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The first thing I'd suggest would to be to check and clean the air filter. It could be starving for air causing the butterfly to partially close which causes the governor linkage to 'throttle up' then the restricted entering air causes it to pull down.

Also if you have last years gas in it, dump it out and fill it with fresh summer blend gas and try again after cleaning the filter.

Posted on Apr 01, 2015

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Posted on Jan 02, 2017

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Please rank me if this was helpful,
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