doubletrouble
Member
I have twin 4.3 efi mercruiser engines with 155 hr on each. 1 of the engines emmits blue smoke at start and then stops, but will emmit blue smoke again after it sits for several hours. I have had the plugs checked and replaced. The technician has told me that he does not see anything wrong especially with the hours and it may be old gas (2 engines 1 tank..wouldnt that make both engines smoke) and I should not worry if it is not burning oil.. What else could be causing the smoke, could it be something clugged or am I and my boat neighbors seeing and smelling things.. help