What To Expect From A 4-Stroke
I'm building a Great Planes Gee Bee and I'd like to go with an OS 120 4 stroke but I know nothing about 4 strokes. Are they more trouble than 2 strokes? What about valve adjustments and such? I'd hate to have to send the thing back to the factory everytime I have a problem. (My other option for this plane is the OS 91 2 stroke)