Doosan black smoke

[Ab623]

Hi.

I have a doosan 086, runs at 1500rpm, when the engine is out of gear at 1500 it runs fine and no smoke, when the engine is under load it black smoke and raw water is black with suit, turbo seems ok, I have isolated each cylinder to check injectors and all seem ok. Engine seems to be running ok and no misfiring, just black smoke and suit, anybody any ideas?

 

[julians]

Is the boat Hull heavily fouled?

 

[Ab623]

No not heavily fouled

 

[peteK]

All the signs of a blocked exhaust elbow.

 

[Ab623]

Replaced turbo and engine all good now,