hello there,<br /><br />i have an evuinrude or johnson (not sure but guess evinrude)from 1972 20202R.<br />can't find the english word for it but can somebody tell me how much parts oil i have to mix with how much parts petrol for this outboard?<br /><br />1:100 or 1:50 ????<br /><br />thanks in advance,<br />Jan