I am picking up an used Mariner 3.3 outboard engine. It is 2 stroke so I was wondering if I could use pre-mixed 50:1 TruFuel to run it? I do not do a lot of trips a year so I am not concerned about the cost. If TruFuel is good to use with outboards, the convenience (ethanol free, premixed with oil, availability at local hardware store) is more important to me than the $20/gallon price tag.