Posted by Bob Kerr on September 16, 2007 at 19:50:43 from (64.12.116.73):
In Reply to: stupid motor posted by smdv806 on September 16, 2007 at 19:01:59:
If it pops back through the carb, it is running lean, and a lean condition would also make it slobber. It will only act worse when cold and gets somewhat better as it warms up. Better give the idle mixture and high speed screws a turn to the rich until it stops doing that but only when it is warmed up. On my H and M I do have the screws leaned out some and have to let the engine warm up some before moving it. Too rich will wash the oil off the cyl walls with raw gas and cause wear when cold. Too lean will make it slobber when letting the clutch out or under load when warmed up. Tinker with the mixture until you find the sweet spot where it runs good under working conditions. If you get black smoke, too rich.
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