I have a Stratos XL185 with a OMC 4.3 and Cobra outdrive. It has what seems to an 18 pitch prop on it. It's turning 4800 rpms at 40 mph, but the engine will rev well over 5000 rpm if you let it. The prop is an 18 pitch SS prop. It would seem somebody had it reowrked at one time. I've been...