Join Date: Sep 2011
Location: Dolphin Beach, B.C.
Thanked 19 Times in 19 Posts
Rep Power: 4
Re: yanmar 2QM20 to 3GM30F repower
Our C&C 32 was upgraded from it's original A-4 to a 3GM30F. The shaft was replaced from it's original 7/8" to a 1" diameter shaft and a fixed 3 blade prop of an unknown size. The motor itself is a tight fit and is difficult to work on.
Ours is fresh water cooled.
Other than the engine mounts, the fuel tank and the shaft, there were no further modifications.
However, the exhaust outlet was not changed and it is smaller by 1/2". It does not seem to cause any problems. The engine has almost 600 hours on it and has run flawlessly for 6 years now.
It's a bit over powered but it is nice to know that I can travel through some of our Gulf Island passes with the tide running and make it. It will cruise all day long at 7 knots and 2700 rpm.
We have three rules;
No bleeding on the sails.
No slobbering on the charts.