travelon1979
Cadet
- Joined
- Jun 14, 2010
- Messages
- 15
While winterizing my boat in October I noticed the exhaust water flowing off my concrete driveway and into the grass had charcoal colored substance. It wasn't oil, lube, or fuel as it did not have a rainbow sheen. When I moved my finger through it reacted almost like it was a solid but didn't appear to be metallic. It was more like a film.
If it's not lube, oil, or fuel what could it be?
Based on research could it be carbon from running rich during warm up? I've never noticed the substance before so is a bit concerning as I'm sure I would have noticed so why would it be running rich enough to flow out carbon
I send my oil off to be analyzed. My analysis last year came back as having more than the recommended amount of fuel in the oil. Over 4% for a marine engine was the labs cutoff. They stated they allow more for marine engines. I warmed the engine for about 5-10 minutes so assumed that would burn off the excess fuel before taking the sample. I was told by several people not to worry. But now that I'm seeing what could be carbon I'm concerned I may have a fuel injection issue.
Any advice or knowledge anyone would like to bestow on me before I drop off to the dealer.
Thanks again!
If it's not lube, oil, or fuel what could it be?
Based on research could it be carbon from running rich during warm up? I've never noticed the substance before so is a bit concerning as I'm sure I would have noticed so why would it be running rich enough to flow out carbon
I send my oil off to be analyzed. My analysis last year came back as having more than the recommended amount of fuel in the oil. Over 4% for a marine engine was the labs cutoff. They stated they allow more for marine engines. I warmed the engine for about 5-10 minutes so assumed that would burn off the excess fuel before taking the sample. I was told by several people not to worry. But now that I'm seeing what could be carbon I'm concerned I may have a fuel injection issue.
Any advice or knowledge anyone would like to bestow on me before I drop off to the dealer.
Thanks again!