- Jun 5, 2016
- 5,617
- Boat Info
- 410 Sundancer
2001
12" Axiom and 9" Axiom+ MFD
- Engines
- Cat 3126 V-Drives
Thats not good. Is it now constant output of soot of only start up/shutdown? Regardless its either unburned fuel or oil...
I would start by checking the cylinder compression as you can borrow a compression test kit from a local auto parts store and is pretty easy to do through the glow plug holes. It could be bad compression in one or more cylinders. There is a test procedure in the technical manual. But it could be it needs a head torquing and valve clearances adjusted, or stuck/bad piston rings.
Beyond that, we get into fuel metering from the injection pump. One thing to check is that you fuel run solenoid is pulling all the way back, but I would expect under fueling in that case...
I would start by checking the cylinder compression as you can borrow a compression test kit from a local auto parts store and is pretty easy to do through the glow plug holes. It could be bad compression in one or more cylinders. There is a test procedure in the technical manual. But it could be it needs a head torquing and valve clearances adjusted, or stuck/bad piston rings.
Beyond that, we get into fuel metering from the injection pump. One thing to check is that you fuel run solenoid is pulling all the way back, but I would expect under fueling in that case...