SRMark
Member
I have a 2004 420 Sundancer with 6CTA s. I changed my oil using the reverse pump on Saturday and from the starboard engine I pumped out 6 and 1/2 gallons of oil. It was black in color and there was no sign of water, it was not brown or milky colored. I am scheduled to put it away for the winter this weekend which is an 30-45 minute ride on the water from my marina. I am trying to get a mechanic to look at it before I run the engine. The last time I ran the boat, the previous weekend I went on a two hour ride on Friday and two hours back on Sunday with no issues, good power, good oil pressue, no smoke. Could diesel fuel be getting in the crankcase oil?