Re: '52 200, ultramantic, runs rough at about 50mph or more

Posted by JWL On 2012/9/10 10:18:57

Probably a fuel problem since you have just done an ignition tune-up. It sounds to me like it is starving for fuel. Plugged up filter? Check the filter first, if you have one. If not, remove the bottom bowl from the fuel pump and see what is there. May have stirred up some dirt with the last fuel fill-up and that is what is causing the problem.

One more thing, is the gas cap vented?

(o[]o)