So I bought a '78 O'day last year and had no issues (my first sailboat). This past weekend was the first decent weather weekend of the spring so I finally un-winterized the boat, including the Atomic 4. The engine is very original, but runs well for a 35 year old. Anyway, got her up to operating temperature, went below and notices a "haze". After some investigation, noticed that the wrap around the exhaust from the engine to the standpipe was smoking. This material is not new, so it can't be that it was setting in. Any idea why this pipe would be hotter than normal? The engine thermostat was 140, which is normal for last year. Any advice would be appreciated!