[C320-list] Gori prop spec needed

[Pat Moriarty]

What is your distance from the cutlass to the prop and did you get 
any new vibration with the prop. I have a different 
motor/transmission and the 15x10 needs to be a 15x9 but I gained a 
ton of vibration.

Pat #130

At 05:09 PM 10/29/2007, you wrote:
>Hi all:  Surprise is a 1999 boat with Yanmar 3GM30F engine and 2.21:1
>gearbox ratio.  I need to know if anyone with same engine and gearbox has
>successful performance (i.e. is able to reach full RPMs in gear) with a
>Gori 2 blade folding prop.  If so, I'd like to know what diameter and
>pitch works.  The prop that they sold me (16.5" diameter, 11" pitch) is
>over-pitched per sea trial data, and I need to figure out what replacement
>blades would work for me.  Gori is proposing a smaller 15" prop but with a
>12" pitch.  The latter would seem to be moving in the wrong direction, but
>I know that with the smaller diameter this could be the right solution.
>But is it?
>
>Any help will be appreciated.
>
>Scott Thompson

Pat Moriarty
PSI Urethanes Inc
PH: 800-888-5156  Fax: 512-837-8733
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