The engine starts fine from cold every time. Once warmed up especially after a good run, dropping it into Neutral, the engine idle starts to roughen up after a few minutes and stalls. I can get it it to start if I give it some throttle, but it stalls when I put it in gear unless I shift the lever a good way forward to get the revs up quickly enough to prevent this.<br /><br />Any ideas? Also how do I set the idle speed? All I can find on each carb is a big screw which seals with a tiny o ring. When removed there is a jet underneath which can be unscrewed. Does this jet have something to do with the idle speed or should it be screwed in all the way?<br /><br />Also, what is the carb cleaner stuff called?<br /><br />Thanks,<br />Paul