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  1. J

    Yanmar 1GM10 Exhaust Water very dark and peak 2400 rpms

    Recently got this old boat, a 1981 Santana 3030. Is not the original engine. At first all fine. Clear exhaust. 3300 rpm. Now exhaust water is dirty/dark. Max rpms 2400. Pulled off mixer elbow and it is clean except for soot. Found some diesel fuel on the mixer elbow gasket. Is not using...
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