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Old 24-03-2014, 00:08   #16
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Wrong transmission oil

Hi Jim, you seem to be the person who can help me out with the problem I have on hand. My boat has a Yanmar 3JH2E engine fitted with a Kanzaki KBW10 gear box. Two months ago, I had a mechanic changed my oil when I was going away from my boat. Just found out that the mechanic had put in regular engine oil into the gear box instead of the ATF oil specified. How can I correct the mistake? Can I just pump out the engine oil and put back the red ATF? What about the clutch which has been soaked in engine oil for months. Any problems there? Eric
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Old 24-03-2014, 00:13   #17
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Re: Changing transmission oil

Quote:
Originally Posted by ericlo View Post
Hi Jim, you seem to be the person who can help me out with the problem I have on hand. My boat has a Yanmar 3JH2E engine fitted with a Kanzaki KBW10 gear box. Two months ago, I had a mechanic changed my oil when I was going away from my boat. Just found out that the mechanic had put in regular engine oil into the gear box instead of the ATF oil specified. How can I correct the mistake? Can I just pump out the engine oil and put back the red ATF? What about the clutch which has been soaked in engine oil for months. Any problems there? Eric
G'Day Eric,

Hmmm... you seem to have me confused with someone who actually knows something! And I really don't know anything at all about Kanzaki gearboxes.

With that caveat, if I were faced with your situation I would drain the bad oil, put in the requisite ATF, run it for a short while, perhaps under only a light load and shifting from forward to reverse a couple of times, and then change the ATF again.

That should get you back to normal, and I doubt if you have done any damage.

Good luck,

Jim
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Old 24-03-2014, 06:26   #18
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Re: Changing transmission oil

My Hurth 630V transmission holds plenty of fluid, even after drawing from the drain plug.

If the intent is to purge old / bad / wrong fluid, then use compressed air to purge the oil cooler. It is also possible to unbolt / disassemble the high-pressure pump to clear the old fluid.

Here is a reply showing the high pressure pump disassembled for cleaning.
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