ORIGINAL: Dgremlin
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)
Go ahead and get the four stroke and enjoy. Just pretend it is a two stroke at first and you will get used to it in no time.
The OS 120 four stroke is a conservative runner and you will just love it.