Prop for 1988 Yamaha 90 ETLG

My motor is almost ready... :-)

From an e-bay special with a hole in the #2 piston, its come to life and runs well...

It will be installed on a 15ft bowrider, just wondering what the OEM prop would have been.

I'm even interested as to what prop I should put on to keep the revs down, and perhaps keep it lasting longer?

[boats.net]

90ETLG has a operating range of 4500-5500 rpm's. Just start with something like a 15 pitch to see what rpm's it turns then go up or down in pitch, each 2 inches of pitch will change rpm's 400-500 rpm's.