[C320-list] transmission ratio

[Karl Mielenhausen _/)]

You are fairly close to my hull # (690).  I have the Japanese-made 3GM.
Gear ratio is 2.21:1.

On Mon, 09 Nov 2009 11:50:06 -0500, Paul Adison <pjaarch at verizon.net>  
wrote:

> I have pulled my prop in order to have it repitched.  I believe that it  
> is to flat.  I am able to run my boat under load at 3800 rpm which is  
> higher than the rating of the engine.  The prop shop has told me that by  
> adding a 1" pitch to the prop I will be able to reduce the max rpm to  
> 3600 which is the rating of the engine.  This will add fuel efficiency  
> and increase cruising speed at the same time.  Does anyone know the  
> transmission ratio for the yanmar 3gmf?  The shop would like that  
> information before starting work.  I know it is on the transmission  
> itself up I am not near the boat.
>
> Paul Adison
> S/V "Rough Draft" _/ )
> C320 #722
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-- 
Karl Mielenhausen
Catalina 320 Hull 690
New Bern, NC