RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
fossmarkluni I just saw your comment about RPM and wanted to say that a new engine should never be over loaded. Its better to let it run fast (within reason, I mean over 8000 is pushing it) with a lightloadthan to really make it work hard with a large prop. Also the faster rpm will help bed the rings in and hammer the valves into their seats. My manual states clearly to use an 18x10 or 20x8 for running in, and I have since found that 20x8 menz props give me a happy engine in the air.