1990, 60hp, 3cyl Merc smokes too much.

[Tyee]

Blue/white smoke follows the back of the boat and turns the transome black after a day of trolling. The fuel/oil mix is correct and theres no sign of any water in the plugs. It starts fine, idles fine and has plenty of power. I feel kind of like the Peanuts character "Pigpen" with a cloud following me. If my gas was contaminated with water wouldn't it run badly?

 

[DJ]

Re: 1990, 60hp, 3cyl Merc smokes too much.

Tyee,<br /><br />Bluish smoke is normal. Two stroke engines, particularly larger ones, are very inefficient at idle speeds. There is a great deal of unburned atomized fuel being dumped overboard.<br /><br />While all this idling will not kill your engine you need to do some things to maintain it diiferently than an engine that works a little harder. I would decarb. the engine frequently. You can buy decarb. spray from your local dealer. Just follow the directions on the can.<br /><br />If it were mine, I would be looking for a "kicker".