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Black soot on surface while running

N

northern_lights

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1986 Westerbeke 7.5kw Gas wit

1986 Westerbeke 7.5kw Gas with 150 hours on it doesnt seem to smoke but I notice thin patches of oil that forms into little pools of black soot. This is in Northern Calif waters...so water temp is 49-degrees. Lack of running or am I looking to have to replace something???
 
"My Universal M-18 exhaust lea

"My Universal M-18 exhaust leaves some black soot on the transom. The marina staff cleaned the air cleaner and did a compression test. One cylinder was a little under the specs.

Question, could the decompression lever be the problem?

Question, could it be an injector problem?

What has anyone experienced with similar problems.

Thank you"
 
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