My engine is a Johnson from 1985 <br />Modelnumber: J20BEL0NB <br />Serialnumber: B007701<br />Two cylinder <br /><br />20HP spark advance 34 degress (and it says 1978?)<br />Manual start<br /><br />A dealer told me that the only things that were different between 20 hp to 35 hp were the...
