I am new to this forum and have looked for a similar experience but have not found one...so here goes my story.My motor has 75 hours of run time. At about 50 hours it started to misfire at both high and low speeds. By increasing the rpms to 4-5k it would clear up and run well for some time. This year it started out great but after about an hour of operation it started misfiring. High speed cleaned it up for a bit but now it misfires at all speeds including idle but starts well. When looking at the plugs there is no real evidence of a fouled plug. I have repplaced the plugs and moved them around without success. Does the intermittent action weigh towards electrical or fuel? Thanks for your help in figuring out my mystery motor.
Mulle
Mulle