Any suggestions on a prop for my V-21 200 Yamaha 2-stroke? I'm new to the serious boating stuff been aroud them all my life now I'm paying attention. The aluminum prop that came with has no stamp on it indicating what pitch or size it is. I hit 48 Mph on the GPS full out if the tack was right it was 5000Rpm and 33 Mph at 4000 Rpm. Does this sound right or not

. I want to get to try and find a SS one I'll be doing day trips out to some Islands mostly. I'll be going out with my father tomorrow to see if the tack is on or not hope fully I can pin down some more accurate info.