What is the gas mixture for a 1979 2 stroke mercury engine 140 hp?

For a 1979 2-stroke Mercury 140 hp engine, the recommended gas mixture is typically a 50:1 ratio of gasoline to 2-stroke oil. This means for every 50 parts of gasoline, you should add 1 part of the appropriate 2-stroke oil. It's essential to use high-quality oil designed for marine 2-stroke engines to ensure optimal performance and engine longevity. Always check the owner's manual for specific recommendations related to your engine model.