What is the oil to fuel mixture for a 1981 115 horsepower mercury outboard engine?

For a 1981 115 horsepower Mercury outboard engine, the recommended oil-to-fuel mixture is typically 50:1, which means mixing 2.5 ounces of oil per gallon of fuel. It's important to use a high-quality two-stroke outboard oil to ensure proper lubrication and engine performance. Always refer to the owner's manual for specific recommendations and any updates on fuel mixtures.