'Lo all.

Friend of mine has a US-41 I just sold him. Ran fine on my P-51 but I needed to upgrade (and so did he).

Fast forward 6 months later and he's putting the 41 on his Robinhood 99. Problem is, it won't start! Occasionaly if you squirt just enough fuel in the carb it'll fire but run really rough. It is never consistent, and doesn't turn near the RPM's I turned using even a slightly bigger prop than his (when it runs).

Carburator is cleaned and re-cleaned. Needles are all factory. Mag is on good, gotta good spark. Fuel system is all setup good. Just doesn't seem to want to draw fuel.

Possible compression problem? Timing bumped?

Help needed![sm=drowning.gif]




Also, when he took apart the carb first time, there was a small "bb" or bearing laying in the carb. There was a rocker arm in it that the bearing apparently fit into at some point.................?