What lower unit oil?

[Craiger12]

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.

[Diablos]

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.

[Catt]

http://forums.iboats.com/showthread.php?t=140022

[NBR]

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

[backseatk]

yamaha or merc will work