I just aquired barely used Magnum XL 108A engine. I did not get a owners manual so I need a little help form anyone who knows something about this engine. I have 10% Omega fuel and I was wondering if that will work in this engine or sjould I go get another gallon of 5%. I also have MAS 15x6 & 14x6 props. Are they the right size or is something smaller or larger better. Soulr I start with 2 1/2 turns out on the needle like mist 2 strokes? Also the carb that came with the engine says 91 on it. Is it the right carb?[:-]