Re: 1973 evinrude 6hp
Any 2 cycle oil at 50 to 1. I prefer mecury 2 cycle oil but they are all pretty much good. The can will tell you how many ozs of oil for each gallon of gasoline. It is a pint of oil to 6 gals of gasoline, if you have a 6 gal tank, put in a pint of oil and fill it with gasoling, from then on if the tank isn't empty you will have to do some figuring. It is good to be exact, but it isn't necessary so long as you aren't really off in your mix.