Senior
Posts: 2758
Joined: Oct 2009
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Wolfie, Whatever the cause of your engine running rough, there is no adjustment of your carburetor to address that issue, and we'll need further information to diagnose that problem. The two screws you did try to adjust are only for the idle, and do not appreciably affect how your engine runs while driving. These screws are needle valves, and adjust the amount of fuel that is sucked into the throat of your carb at idle. To check on their condition, unscrew them all the way out, being careful to retain the springs as they come out. They should both be straight, pointed sharply on the ends, and with no indication of having been screwed in tightly with a screwdriver. Screw them both in all the way by hand, and turn them out 3/4 turn for now, and we'll try to help you get your engine to run well before adjusting them properly.
Alan
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