I have a 1980 Johnson 35 HPEL (#ES085086). I bought it 3 years ago and immediately had it completely overhauled. It ran perfectly until about the end of last season when it started to occasionally lose power and bog down with what I thought was a gas/fuel supply problem. I completely emptied the tank and fuel lines and replaced it with fresh gas/oil mix and that did not change anything. I checked the fuel filter and it is perfectly clean.<br /><br />The problem has become much worse lately - to the point that the motor only fires on both cylinders after it is started cold. Once I restart the motor after it warms up it only has spark on the upper cylinder. If I hold the throttle wide open after the motor bogs down it occasionally tries to fire on the second cyclinder (this happens once about every 5 minutes). I have replaced the spark plugs - they were oil fouled - but that has had no impact on the problem.<br /><br />I'm certainly not an outboard expert, so I am looking for suggestions on where I should look next. Is this a stator problem, perhaps?