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.