Oil / Fuel Mixture 85 HP 1989 Yamaha Boat Motor

[wgdoty]

I recently purchased a 1989 85HP Yamaha boat motor; but, there is no owner's manual with it.

What is the oil to fuel mixture?

Thanks for the help!

 

[rodbolt]

Re: Oil / Fuel Mixture 85 HP 1989 Yamaha Boat Motor

50/1 or 2.6 oz oil to every gallon of gas.