Originally posted by scottie2hottie
The engine is not a new engine, I had it on a different plane for two years with a lot of flight time on it. However since I mounted it on this plane I have had no success at keeping it running reliably. I'm thinking it could be the fule tank, I meay replace it as a first step.???
I ran into the exact (almost) same problem as you did. I purchased a GP 42 for use on my something extra about 2 years ago, then due to other happenings, It took me like 2 years to finish the plane. In that time I had "Broken In" my thundertiger...then it sat....for like a year. Finaly finished my SE and slapped the 42 back on.....ran like crap....no matter what I did...wasn't consistant, would periodically die.....ect.
I finaly got fed up with it and tore the whole thing apart, every nut, screw and bolt. Cleaned everything really good and put it all back together again...
It ran like a Champ!!, still not enough engine for the SE, but a whole lot better than it had been before.
I think what happened was that I didn't clean all the fuel out before I put it away after not running it for a while....there were some very small peices of something (looked like evaporated/coagulated fuel) in the carb....might be a good place to start....pull off the carb, take it apart and clean it.
Give it a shot...