Re: Hello, I am new with a question:
Howdy, Nam.<br /><br />Welcome to iboats.
<br /><br />I suspect that what you have is a model RK-24L, which is a 1962 40HP Johnson. I have no record of a BK model.<br /><br />Correct fuel mix is 24:1, 1 qt. TC-W3 outboard oil to 6 gal. 87 octane unleaded gas.<br /><br />Spark plugs are Champion J4C (used to be J4J) gapped at .030"<br /><br />Set point gap at .020"<br /><br />Good luck.