Motorboats can be a significant investment, so it stands to reason that owners are going to have plenty of questions. For instance, “What kind of oil should be used for a two-stroke motor?” Generally, Evinrude XD100 oil, XD30 or XD50 are recommended for motors that were manufactured between 1993 and the present day.
Another question that frequently gets asked is “What is the ration of fuel to oil for my motor?” Motors made prior to 1958 use a 20:1 ration whereas 1959-963 models go by a 24:1 ratio. Motors from 1964 to the present use a 50:1 ratio. For racing or for breaking in a new engine, use as 25:1 ratio.