I'm trying to run in a Super Custom SC-91 FS. This is my first 4 stroke. The first tank of fuel went through fine as per the manual. I ran it very rich with plenty of smoke out the exhaust.

A day later and I can't get the engine accelerate at all. Whenever I try to apply throttle the engine bogs down and usually dies if I don't reduce the throttle in time to maintain idle. Any tuning of the top end needle doesn't help. It idles fine though. I suspect I may need to lean the bottom end needle, is this correct ?

Any help would be much appreciated,

Tony