ORIGINAL: klhoard
OK, this is going to sound really, really strange. . . but here I go. . .
Have you checked the rear bearings?
My OS 1.40 would load up excessively 3 out of 4 times on the ground so bad that fuel would run out of the carb. I tried everything until it finally deadsticked one flight. The rear bearings were rusted to the point they were making noise. I replaced them and it runs like a top ever since.
Don't ask me to explain what the rear bearings have to do with the mixture. . . . I don't know. . .it is just one of those mysteries of life. . .
Yep there's that too. How long since you ran it the first time as opposed to how many flights since an overhaul?
if the bearings are bad, the engine is shot. keith is 100% dead on target. So take that in to acct too.
-Mike