Quote Originally Posted by Deer Slayer View Post
The engine is a mercury 115 horsepower, the prop is a mercury spitfire, and the rpm runs at about 900 at idle with both props. The 3 blade prop and four blade prop are both 19 pitch and I don't know what style the prop is but mercury makes it.
no,i mean what are you MAX speed rpms? its probably not what i said, but it should be checked out. even though they are the same pitch, a four blade in a 19 is more like a 20 in a 3 blade.