ORIGINAL: RegFlyer
When i first got my OS40 LA, i was suffering from major impatients. Inever broke the engine in as per the manual. It seems to run fine now that i have run about a gallon though it.... should I go back and rebreak it in, is that possable or should it be fine to keep running as is.
If you already ran a gallon through it, I'd say it's already broken in!
40 LAs are nice little engines, but they're a little wimpy for most 40 sized planes. The 40LA is right between the 25FX and the 32SX for power and weight, so I actually use mine on 25 size planes. I consider it a "poor man's 32SX". It'll do OK on a 40 sized trainer, in fact I'm planning to put one on a 40 sized Tower Trainer for my son. He likes to peg the throttle and yank the controls around, so the slower flying the plane, the better!