I have a 2001 20I with a 350 mpi mercruser motor. Runs great but every time I go to clean it up I notice a black film around the exhaust pipes. This is not a big deal but what is causing this? Bad gas? Injectors clogged or ? It doesn't smoke at all when it is running. Should I be concerned with this or is it common with fuel injected motors? Any info would be helpful....
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Black film on boat
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Pretty much normal, the soot is a combo of low engine temps (compared to autos) and lack of catalytic converters to finish the combustion process.
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Thanks for the info chpthril....no I didn't know about the T.O. get together....
We ride on lake tillery....its the closest to home....mainly on fridays when there's little boat traffic.....
To dogbert....I use a 50/50 mix of grease lighting and water....Just rub with a rag....I use an old toothbrush to get into ths small places....be sure to rinse off before it drys.....
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