Quote:
Originally Posted by sidelock
. . . I did notice that the rough idle only seems to occur when it's in gear and under load, not saying that it's not missing at all in neutral but if it is, its not obvious enough for me to notice. Seems like the vibration is gradually getting worse or more pronounced.
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That's because it takes more fuel/power to spin the prop in gear than it does to just overcome friction in the system in neutral, so if one cylinder is lean, it will be more obvious when it's under load. Red's idea of reading the plugs MIGHT reveal the suspect cylinder if you do it under load. But to fix it you're gonna have to disassemble the offending carb, soak it overnight in some strong carb cleaner, and then blow out all the passages with some compressed air. Snake oil ain't gonna fix it!