I have a Sailmaster 7.5, which my research has shown is a Johnson. Based upon the model number ( J8SRLCTA ), I think the motor is a 1983.<br /><br />I don't know anything about this motor (or actualy boat motors at all, since this is my first one).<br /><br />I assume its a 2 stroke.<br /><br />My questions:<br /><br />1. What is the proper oil:fuel ratio for the mix?<br /><br />2. Current plug is NKG B9HS 10. The plug wire has a label which states use Champion L77J4 or AC M40FFX. Is there a preference for one particular plug? If so, why is one better?<br /><br />3. What is the correct gap for the plugs?<br /><br />Thanks for any info you have.
