Volvo penta md 2030

[drinu]

I have a problem with my engine..the thing is that at 2500 rpm the water coming out from the exhaust outlet has a darkish colour sort of black not to mention that white smoke also comes out...i have serviced the engine(new oil,filtersetc) myselfand i also changed the injectors...

can you pls give me another explanation for this to happen.

regards

Andrew