I’m getting a strong exhaust odor in both the cockpit and cabin while underway. And when motoring for > 2-3 hrs, a fine, black residue can be found on certain white surfaces in the cabin (e.g., on white plastic cups in an aft cupboard). I had a mechanic do an inspection of the exhaust system…he reported everything was “OK”, except for the exhaust hose from the muffler to the thru hull, which he replaced—but this has not helped. There seems to be more than the usual black residue on the swim platform above the exhaust outlet, but I’m not sure what’s normal.
Not sure what next step to take. The mixer elbow has not been replaced since I’ve owned the boat (3.5 yrs) and the muffler could be as old as the boat (1996)—but not sure if these would cause the symptoms I’ve described. Engine has ~ 800 hrs and otherwise starts and runs extremely well.
Any suggestions would be greatly appreciated.
Not sure what next step to take. The mixer elbow has not been replaced since I’ve owned the boat (3.5 yrs) and the muffler could be as old as the boat (1996)—but not sure if these would cause the symptoms I’ve described. Engine has ~ 800 hrs and otherwise starts and runs extremely well.
Any suggestions would be greatly appreciated.