Re: Throttle sticking on 1929 640

Posted by LouCiro On 2020/1/25 16:14:05

Thanks for the reply. You are correct this spring was added as a poor fix for the problem. I am attaching photos of the accelerator spring and a linkage from it down to the base of the steering wheel.This linkage is very loose and probably shot. What is it for? This seems to be part of the problem.
We cleaned and lubed the throttle shaft but it still hangs up.
What are the three screws on the carb. One seems to be an idle stop , not sure what the others are. The range of motion from slow to fast idle on the lever of the steering wheel seems to be no change halfway up then quickly rises to very fast. Is their a way to broaden the range? Looks like removal and cleaning of entire linkage and bushing replacement will be needed. Do any drawings of these linkages with part #'s exist. ? Thanks,
Lou

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