If not using oil injection, the 115 hp Yamaha outboard will require a 50:1 ratio.
An 1986 model Yamaha outboard requires a 50:1 ratio, roughly one pint of 2 cycle oil, to six gallons of fuel.
50.1
50/1
The 1997 model, 6 hp Yamaha outboard, requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
A non oil injected, 1990 model, 2 stroke Yamaha outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
50:1
As far as I know is 50:1.
The correct ratio for 1991 85hp Yamaha is 1:50. 1 liter of oil for 50 liters of fuel.
The 1982 model, 115 hp Johnson outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
Most all models of Yamaha outboards can be operated on a 50:1 fuel to oil ratio.
oil ratio is 1% Pierre
The 1978 model, 115 hp Mercury outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.