If not using oil injection, the 115 hp Yamaha outboard will require a 50:1 ratio.
50.1
The mixture ratio for Yamaha outboards is 50:1 gas/two stroke oil. That is approximately one pint of gasoline to a plastic coke bottle cap full of two stroke oil.
The fuel mixture for a Yamaha 40 hp 2 stroke outboard engine is 50:1, gas, oil mixture. You should use new gas when you get the engine ready for the season.
the mixture is 50:1 I would use synthetic oil
My 2003 3.3hp outboard motor is 50:1 mixture.
20:1
32:1 gas to oil mixture
The 1997 model, 6 hp Yamaha outboard, requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
50 to 1 oil and gas mixture
50:1 gas to oil ratio
The gas to oil ratio for a 6hp Yamaha outboard motor typically ranges from 50:1 to 100:1, depending on the specific model and year. It's essential to consult the owner's manual for your particular motor to determine the recommended ratio, as using the correct mixture helps ensure optimal performance and longevity of the engine. Always use high-quality two-stroke oil designed for marine use.