Lower Unit Oil F90TLR

[jackmanjls]

The yama manual for a 2006 4-S 90hp says to fill lower unit with:

Recommended gear oil:
GEAR CASE LUBE
SAE: 90

It doesn't say yama gear lube, high-speed, any additives/inhibitors, GL-5/6 or anything else.

I could just go to the auto store and buy basic SAE90 and, from what yama says, that would be sufficient.

I just rebuilt this lower unit and need a suggestion from someone on what they use.

Any suggestions?

[Sequoiha]

I would always use a marine grade sae 90, it doesnt cost much more to go ahead and put Yamaha gear lube in there...