What is the correct gas oil mixture ratio for a 2 stroke 1989 40hp Evinrude outboard motor?

The correct gas-oil mixture ratio for a 1989 40hp Evinrude 2-stroke outboard motor is typically 50:1. This means you should mix 2.6 ounces of 2-stroke oil per gallon of gasoline. Always refer to the owner's manual for specific recommendations and ensure you use high-quality oil designed for 2-stroke engines.