On Mon, 23 Jul 2007 09:21:21 -0700, Capt John
wrote:

I recently bought a 1987 Rinker 250 with Mercruiser Alpha One 260 (5.7
liter). There are no markings on the existing prop, but it appears to
be almost a flat prop - no cupping. The performance is poor, but WOT
is about 5500 RPM. Looking for suggestions for a new proip, or at
least a starting point. I don't want to spend thousands of dollars to
dial it in.- Hide quoted text -

- Show quoted text -

If I remember correctly, I think that wide open should be more like
4400 RPM's.

Yes, 4400 to 4500 is about right. I used to have the same engine in a
comparable boat. It had a 15 x 17 prop which was OK when I bought it,
a 14 1/2 x 17 was even better.