S2 9.2C Repower

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Apr 16, 2008
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S2 30 9.2C -
I am in the process of re-powering my 1982 9.2c. The original engine is a Yanmar 2Gm with an aftermarket (Sendur) freshwater heat exchanger cooling system. I realized that the engine started developing blow-by last year when it blew he dip stick out of the block, coating the starboard side of the engine compartment with oil and filling the cabin with smoke. The engine would consistently stall at idle and this year the situation worsened, with the idle only holding at 1100 rpm or higher. This resulted in several near misses in docking situations when the engine would stall between shifting gears while backing into my slip. I removed the transmission, alternator and belt- driven water pumps after lifting the engine from the engine compartment to the floor of the walk through to the aft cabin and used two block and tackle boom vangs rigged to a boom extension arm which I had made to lower the outboard to the dingy from the rail. This arm is supported on the aft end by the main halyard and I rigged an additional spinnaker halyard as a safety for the additional weight of the diesel. I used this arrangement to gradually pull the engine to the aft birth and hoisted it through the aft hatch, over the rail and on to the dock. This was a very efficient arrangement and I only needed help lifting the engine from the engine compartment to the adjacent floor and then into my car.

I am replacing the engine with a Yanmar 2GM20F which is rated at 18hp versus the 13hp of the 2GM model. Does anyone have any experience with this upgrade and did you have to re-pitch the prop? I have a 3 blade sailboat prop on the boat now, but am not sure of the size or pitch. Any ifo on the upgrade installation would be greatly appreciated.
Thanks,
Capt. Gary Cassidy, USCG Master
1982 9.2C "Windchaser"
 
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