Northern Lights Genset

[Trammo]

Hello out there. I have a 2006 model M673L2 genset at 2279 hours on our 16.4m cruising yacht. Problem is black smoke from the wet exhaust under load. Have checked air cleaner, fuel, fuel filter, injectors, injection pump. Next step seems to be a faulty governor. Does anyone have experience of this or any advice. We can use it under light loads. Thanks

[GordMay]

Greetings and welcome aboard the CF, Trammo.

➥ http://www.northern-lights.com/PDFs/...fs/OM673L2.pdf

[djmarchand]

How could a governor be causing black smoke??? A governor controls rpm and should have nothing to do with smoke.

Black smoke is either caused by too much load (not likely on a genset if you stay within its KW rating), low air flow or in rare cases a poor injector spray pattern.

With 2000+ hours on the engine, I would look at the exhaust elbow for plugging which will cause back pressure and restrict air flow.

If this doesn't solve the problem, post your problem on boatdiesel.com. Eric on that forum (handle Ski in NC) is a pro on marine gensets and should be able to help.

David

[Trammo]

Thanks David. Water supply through the exhaust is good, but I'll check the exhaust elbow. Much appreciated.

[Trammo]

Originally Posted by Trammo

Thanks David. Water supply through the exhaust is good, but I'll check the exhaust elbow. Much appreciated.

well as it turned out, a blocked exhaust elbow was the problem. Completely blocked. Now rectified and all good.

[marlinmike]

Hope you put in the new SS model.