1990 Yamaha 150 Gear Oil

DukesFin · #1 March 16th, 2009, 07:25 PM

I just put a new lower unit on my motor and need to put gear oil in it.

I sold my motorcycle and have the following unused/unopened gear oil left over from the final drive maintenance:

Valvoline DuraBlend Synthetic Blend 80W-90 Gear Oil

Can I use this for the break-in period? If not, it's no big deal, but just thought I may be able to make use of what I've got!

JB · #2 March 16th, 2009, 11:35 PM

I don't see why that wouldn't work, Duke. 90W is what the regular outboard gear oil is.

Maybe someone else thinks otherwise.

triumphrick · #3 March 17th, 2009, 12:15 AM

There is no "marine" gear oil. And that synthetic stuff will probably do that unit some good! I have used anything from the WM brand to Yamaha brand, and it all has basically the same composition. I agree with JB, good luck!

DukesFin · #4 March 17th, 2009, 07:14 AM

Thanks! I hate to waste, but I'll waste in a heartbeat if it would not be good for the boat! Marriage wouldn't take it!