Hey guys, Ive just finished running my weedeater 25 the only mod's I've made where changing the carb for one that came off from a ryobi 31
which is the WT275 and bored the venturi to about 0.400 in, also I drilled the muffler all the way through with a3/8 in drill bit to give it more freedom of exaust, the reading that I got on my tachometer was 8200 rpms with a 15x8 master airscrew prop. I think it is proper to mention that the engine is completely new, it is the 25 cc high output kind, I tink this engine will work real fine on a 75 to 80 inch wingspan plane I will keep on working with it.