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Old 07-06-2010, 14:27   #1
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What Fluid in Yanmar2GM Gearcase ?

I just bought another boat (1982 Hunter Cherubini 33) and am going through the routine maintenance. I downloaded a couple of manuals and if I am reading them right, the gearcase takes the same oil as the crankcase or 30W motor oil.

I would appreciate it if any of you Yanmar 2GM owners would give a big "Amen" on this or tell me otherwise.

Thanks guys.
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Old 07-06-2010, 14:35   #2
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TexSail, I have a 1982 Hunter Cherubini 33 as well

I read through the manuals as well and concluded that I should use the same oil for the gearcase and crankcase: 10W30. Take my opinion with a grain of salt, though; I did my first diesel engine maintenance chores last fall, so my hands-on experience is quite limited.
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Old 07-06-2010, 14:37   #3
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Thanks enovillo. I now have a Canadian brother.
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Old 07-06-2010, 15:33   #4
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Most do use more modern, multi-weight like 15W40 in the crankcase, and original SAE 30 in the gear / trannsmission case (not something like 10W30).
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Old 07-06-2010, 18:29   #5
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Actually, just got a reply from Yanmar USA today. SAE 30 in the KM2P transmission on the 2GM20 engine.

Marshall
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Old 07-06-2010, 20:09   #6
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Thanks to you guys for the advice.
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