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Black Soot on transom

J

Jim Kahoon

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I have a 20ft bayliner cuddy w

I have a 20ft bayliner cuddy with a 3.0 mercruiser alpha gen 2....I noticed yesterday that there was white exaust smoke coming out when at idle and smelled rich burning gas and when i washed the boat off thre was dark black soot on the back of the boat? What could be causing this. Thanks.
 
"Choke needs adjustment or rep

"Choke needs adjustment or replaced if elec. and not heating; touch it after starting and see if it feels warm. When starting a cold engine in neutral, the choke should close the throttle plate all but 1/8". If not then loosen the 3 screws and adjust until it closes to 1/8" and tighten the screws. Pull the spark plugs and clean or replace if covered in soot."
 
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