You are probably aware that Catalina started putting Yanmar 40hp model 3JH3BE diesels in later C380s. My hull is #255 and has this engine. After about 450 hours on the engine, I started getting big-time water leakage thru the seals on the pump. The local Yanmar dealer in Cocoa Florida (where I was when I finally started looking for replacement seals) informed me that:
(1) that pump shouldn’t leak with that few hours of wear and,
(2) that he had encountered several pumps on the 4jh and 3jh Yanmars that were assembled at the factory without a required mechanical seal. Bottom line for me was that the dealer removed the pump, confirmed the internal mechanical seal was not installed, rebuilt the pump and reinstalled it all under warranty.
The only fly in that ointment was that the dealer
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Water Heater Upgrade
From January 99 Mainsheet
2/1/1999
An upgrade is available from Westerbeke to improve engine-sourced hot water.
This moves the hose connections for the hot water heater from the original port side of the engine to a set of connections at the water pump and thermostat. A new fitting is required for the thermostat housing tap. The water pump housing has an extra tap that can be used. Samantha (#31) has been configured in this manner and the hot water whilst cruising has been very nice indeed.
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I spoke with Jerry Douglas about this long suffering problem. According to Jerry, all tanks up to boat 177 were 27.5 gallons as determined by outside measurement allowing for wall thickness, etc. Boat 178 will have a 34.3 gallon tank. The new tank can be retrofitted via a drop in; ie, no fiberglass work. It costs $322.35 FOB factory.
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Filter Pressure Drop Gauge
From January 99 Mainsheet
2/1/1999
This might be a good time to bring up the issue of fuel filters. Either we clean them regularly (and most of us probably do not) or they slowly clog up and interfere with proper flow to the engine, maybe when the engine is most needed! It would take only one bad batch of fuel to clog the filter.
Consider adding a fuel suction meter in the line between tank and fuel pump. This meter will give you an absolute indication of the pump suction required to bring fuel from the tank. Mark the pressure with a clean filter and, when it increases, check the filter. The cost of installation and parts was about $120.00. It can be tee’d into the fuel line anywhere and does not require fuel system bleeding. Not too bad for peace of mind whilst at sea.
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