HELP! I have a 1995 440Express and I am getting the station wagon effect from exhaust off the stern. It happens ay all speeds. There is nothing wrong with engine, have installed turbolaters and fuel seps, but still get billowing black smoke out of the exhaust. Any suggestions?
440 Express Bridge Black smoke from exhaust
- Thread starter Gibsri
- Start date
- Oct 6, 2006
- 12,153
- Boat Info
- 1996 450DA
- Engines
- 3116 Caterpillars
Billowing black smoke is usually a sign of unburned diesel fuel in the exhaust. That can be from restricted intake air flow due to dirty air filters, blocked hull vents, a collapsed hose on the intake, fouled aftercoolers or a turbocharger problem that is limiting the air intake. Other causes may be a fouled or damaged injector tip making the injector spray fuel dropplets rather then atomizing it.
Unfortunately, the typical boat owner cannot diagnose or repair most of the above. Suggest you get a Caterpillar mechanic on the boat to diagnose and guide you.
Unfortunately, the typical boat owner cannot diagnose or repair most of the above. Suggest you get a Caterpillar mechanic on the boat to diagnose and guide you.
Ididntdoit
Well-Known Member
get a new mechanic......a problem like that? - for years?
I have had the local Finning dealer CAT Dealership down to the boat and they have cleaned the aftercoolers, serviced the turbocharger, replaced all of the injectors, checked the air cooling. they are now dumbfounded as the port engine still smokes badly
