What is the gas oil mix in a 1977 mercury 80 h p?

The 1977 Mercury 80 HP outboard engine typically requires a gas-oil mix of 50:1, which means 50 parts gasoline to 1 part two-stroke oil. This translates to 2.6 ounces of oil per gallon of gasoline. It's important to use high-quality two-stroke oil designed for outboard motors to ensure optimal performance and engine longevity. Always consult the owner's manual for specific recommendations related to your engine.