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Jeff Roy
New member
Username: Jeffr

Post Number: 99
Registered: 03-2001

Rating: N/A
Votes: 0

Posted on Wednesday, April 13, 2005 - 09:03 am:   

I sent my Martec RH14X10 prop back for refurbishing. I provided all the information they requested and they told me I was "way underpropped" and they seemed very familiar with S2 9.1s and said most of them had the wrong prop. They told me that the earlier Yanmar 2GMs had a 2.1 reduction gear and that is what S2 speced the prop for. Later models got a 2.6 reduction gear and S2 never updated the props they were installing.

I just got it back fitted with new 15X12 blades installed on my rebuilt hub. It looks brand new.

I will report back when I get it in the water and evaluate the performance.

I have never had good performance under power. I could easily over rev the engine and in tough conditions could not get much for speed. Last fall I had to motor into a 35 knot wind and even with the engine at 3400 RPM we couldn't make 3 knots. In flat water I could only reach about 6.2 with the engine reving at 3200, and the slightes wave or rudder movement the speed would drop to 5.8. Under most conditions I motored at 5.2.

I would expect these boats to be able to steam at 6.5 or so.

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