Exhaust

[Mike Oliver]

I just purchased my Hunter 37 and was taking it to it's new berth after about 7 hrs of motoring I discovered that I may have a little problem. With the exhaust below the waterline when motoring the transom was covered with an oily black soot. On previous boats the exhaust was above the waterline and the exhaust was carried away. Any thoughts on this and do others have the same problem

 

[J. Tesoriero]

It's your engine

The appearance of black oily soot on your transom may be an indication that your engine is overloaded. While there may always be a little soot, it should not be a major problem, i.e. "covered". An overloaded engine, usually from an over-pitched prop, will smoke (black), and may overheat. There is also a list of other possible causes but I would start by talking to a prop knowledgable person, surveyor or mechanic, and consult the archives on this site for solutions.

 

[Terry]

Mike, what RPM were you running the engine...?

The exhaust on our P42 is at the waterline but not submerged as is many other Hunters that I've seen. Is your port actually submerged? Running the engine too hard may cause the buildup that you refer. Ours builds up too, but easy to clean off.Was your engine spewing black smoke during your cruise? How many hours on the engine? This may be normal buildup. TerryP.S. Do you now have a slip at the White Rock dock? I frequent the government side whenever I check in with Canadian Customs.