When I bought my 1983 23', it had a 235 on it(in 93), it had a 15x15 prop. The same prop worked fine on a 200 Ocean runner. When I put on a 225 Yamaha ox-66 Saltwater series, I tried a couple different props. I settled on a saltwater series 15 1/2 x 19. After a test ride with a factory rep, I was able to exchange it for a 15 1/2 x 17. It was still a little over-propped, but close and I loved the way the boat rode with the prop.
I then bought my current motor, a Yam F 225. I put the same prop on it and used it for several years before getting a Solas 4 blade. Since my motor operating range is 5000- 6000 rpm (really 5500-6000) and my motor then turned 6100 rpm, I figured that was close enough. I got to thinking about it and I asked my mechanic. He told me that the motor has a rev limiter at 6100 rpm. So now I'm thinking I could be under propped. By how much, I really don't know.
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