soot

My E-28 always developes transom soot after a day out. The exhaust is located in the bottom center of the transom under the ladder and points straight back. The boat is powered by a Universal M3-20 18hp diesel that starts easy and runs relatively smooth for a 3 cylinder diesel engine. Is this...

We just had our E39-B polished and waxed ... very nice :-) Of course, as soon as we started up the diesel after the "service" we got a black streak running down the hull at the stern. My gut reaction is to try to attach a 1" (or so) extension to the exhaust to keep the sooty drip from...

I have a 1985 E32-III with a Universal M25 Diesel & a feathering Maxprop. Last year I replaced the "riser" and all of the hoses exiting the manifold. This year I am noticing that when I put her in reverse...I notice black soot on the water after backing down? I have tried running it hard in...