Synthetic gear oil for Yamaha Four Strokes

[daryn_kash]

Does anyone use synthetic gear oil in your freshwater four stroke Yamahas? I dont think Yamalube makes it. i know they have an HD Gear lube.

[pstephens46]

I’ve used both types. Follow the specs shown in your owner’s manual.

[davepjr71]

Does anyone use synthetic gear oil in your freshwater four stroke Yamahas? I dont think Yamalube makes it. i know they have an HD Gear lube.

What outboard? Some outboards don't play nice with synthetic like the SHO.