www.iFourWinns.com

So, I flushed my engine/outdrive this morning and the water coming out initially was black. Looks like really fine sediment was being flushed out. After a minute or so, the water was clear. The boat has been sitting in my driveway for a few months now.

Rust, sediment, or something else?

Thoughts?

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2002 Funship 214
VP 5.7 GX Si
2003 Tahoe

Howdy,

It might be carbon from the exhaust system. The engine might run a little rich if it's carbed due to the choke or rich from the EFI (although it shouldn't be enough to make black smoke) The carbon might break loose when the water is exhausted thru the y-pipe....


If it was rust, it probably wouldn't be black.


I love that picture in your sig.....where is it?

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1987 Four Winns Liberator 211, formerly OMC 460 King Kobra powered, replaced in 2006 by a 1997 Mercruiser 454/Bravo III

The picture is at Lake Mohave in one of many such coves up-river. It's pretty awesome this time of year - not so many people and the weather is still great!

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2002 Funship 214
VP 5.7 GX Si
2003 Tahoe

I really liked Mojave, Only been there once.... many years ago...

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1987 Four Winns Liberator 211, formerly OMC 460 King Kobra powered, replaced in 2006 by a 1997 Mercruiser 454/Bravo III

The black stuff sound like what you used to get in old domestic heating systems that had cast iron radiators; it's just another oxide of iron that forms in water ( Magnetite, Fe3O4)

Graham

My service guy at the dealership said not to worry about it - just junk in the system....

Still, it's a little off-putting seeing all that crap coming out.

Probably just means I need to use the boat more often!

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2002 Funship 214
VP 5.7 GX Si
2003 Tahoe

As long as it runs clear at some point thats good thing.

Mike

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Mike
2007 Horizon 200 SS
5.0 GXi SX drive.