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What lower unit oil?

Craiger12
in Bass Boats, Canoes, Kayaks and more

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This is my first time changing the lower unit oil in my outboard and I'm not sure what to use. I have a 2002 Yamaha 90HP and I thought I had the manual, but after looking it appears that I don't  :-[. Any help would be greatly appreciated. Thanks.

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    Go on Yamaha's website to see if you can download the manual from there. If not go to or call your nearest Yamaha parts dealer.

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    Go to a Yamaha dealer  and buy their lower unit oil.

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