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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.

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Old 05-13-2013
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Re: Yanmar 2QM15: How can I keep it running forever?

Whether to use ATF or 30wt oil will depend on the actual tranny mated to your engine. As mentioned above find out what tranny you've got.. read the nameplate; it should specify.

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Old 05-13-2013
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Re: Yanmar 2QM15: How can I keep it running forever?

Originally Posted by weephee View Post
I have a 2QM15 which I'm going to replace my A4 with. I had no engine history so I had the head rebuilt and some other work done. My manual says to use ATF in the clutch housing which I have done. I've started the engine on a skid but not in the boat yet. Should I replace the ATF with SAE30. I put diesel SAE 30 in the crank case.
Do not run until you check the name plate on the transmission.

The Yanmar manuals give the wrong transmission oil in many cases as the engine may be mated to a different transmission. Triple check before running.
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Old 05-13-2013
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Re: Yanmar 2QM15: How can I keep it running forever?

I'd say it depends on the transmission that's bolted on to that 2qm15. If you have the Kanzaki/Hurth transmission then you should use ATF. My 2qm20 came original with a kanzaki-hurth KBW10 and I believe your 2qm15 came with one as well.

Of course you may have an after market tranny installed. Most folks seem to go with TwinDisc models when the old KBW10 gives up the ghost. They are a bolt on replacement ... they don't use ATF.

Bottom line is to check the plate on your transmission.
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