Hello all, Just acquired a "new to me" 1992 evinrude 48 special 2 stroke. Not sure how much oil to mix with the fuel. The prior owner had so much oil in that gas that it totally smoked up my garage after running for less than a minute! It also caused oil to drip out the exhaust afer it's shut down.I want to balance the mix properly so any help would be greatly appreciated. 