[C320-list] Gearbox Reduction

[twosailors@bigpond.com]

Thanks Bruce, I'll wander over and have a closer look. The exhaust hose is in the way, but i was able to get my phone in and take a darkish photo

Colin Evans
Sent from my 
reasonably smart phone

----- Reply message -----
From: "Bruce Heyman" <bruceheyman at cox.net>
To: <C320-List at Catalina320.com>
Cc: <c320-list at lists.catalina320.com>
Subject: [C320-list] Gearbox Reduction
Date: Sat, May 4, 2013 9:21 am


Colin;
I'm actually down on the boat finishing up my 12 year service.  I cleaned up the bell housing and the transmission and repainted it.  On my inspection plate on the bell housing the word Ratio is cast into the part.  Right after that  2.21 is very lightly stamped onto the part.  If I had not just cleaned it all up and painted it I doubt it would have been readable.
Best,
Bruce

Bruce Heyman
(949) 289-8400

Bruce Heyman <bruceheyman at cox.net> wrote:

>Colin,
>A hand written note in my manual says that the gear ratio is 2.21.  We have a 2000 model.
>Good luck.
>Bruce
>
>Bruce Heyman
>(949) 289-8400
>
>Colin Evans <twosailors at bigpond.com> wrote:
>
>>We have a 2000 model Catalina 320 with a Yanmar 3GM30F engine and a Kanzaki
>>gearbox. 
>>I wish to change the propeller and the suppliers require the reduction
>>ratio.
>>The plate on the gearbox has model KM2P and  Yanmar  indicates that there
>>should be another letter either S or G following, which will nominaate the
>>reduction of 2.21 or 2.62.
>>Also on the plate are the words "Gearbox Ratio", but no information
>>following.
>>How can I determine the reduction ratio.  Were they all 2.62 ?
>>*************************
>>Regards
>>Colin Evans
>>Watermark 
>>2000 C320 # 774 
>>Lake Macquarie, Australia