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Old 23-01-2011, 15:25   #1
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Join Date: Sep 2007
Location: Bahia De Caraquez, Ecuador
Boat: Mayotte/Voyage 47' catamaran
Posts: 97
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Hole in Gear Case of My Yanmar

I have replaced the front main oil seal on my Yanmar 3JH 2CE engine twice because there was oil slinging all over the engine compartment in line with crankshaft pulley.
I finally got someone small enough to crawl over the engine to get a good look at where the leak was, and discovered a small hole just to the left of the crank pulley in the gear case. Maybe slightly smaller than a pencil eraser head. I took a look at the other engine and no such hole. Anybody ever hear of this problem before or have experience with it? Since I only have a hole in the one engine, I am assuming that it is not some kind of breather hole....
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Old 23-01-2011, 22:29   #2
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Join Date: May 2006
Location: Miami
Boat: Privilege P43-47
Posts: 113
Yanmar oil pans

Within two years/150 hrs of purchase, both pans on my new 4JH3E (replacements) started weeping oil from pinholes thruout underside. Pulled pans from both engines and replaced them with custom made pans constructed of 0.25 inch aluminum plate; each holds additional 1,5 L of oil and cost was less than half Yanmar price for new pans. That was 8 yrs ago and no problems with oil pans since.
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