What is the oil gas ratio on a Yamaha 115 hp outboard?

The oil-to-gas ratio for a Yamaha 115 hp outboard engine typically requires a 50:1 mixture, which means you should mix 2.6 ounces of two-stroke oil per gallon of gasoline. Always refer to the owner's manual for specific recommendations, as the ratio can vary based on engine model and year. Additionally, using high-quality oil designed for marine two-stroke engines is essential for optimal performance and longevity.