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I have gas or sheen coming out of my exhaust on a 1999 330 EC ENGINE T-7.4L MAG MPI HORIZON Serial 0L303782, can anyone help?

Royalboater
Guest Contributor
I noticed a sheen on my starboard engine coming out of the exhaust.  We changed the fuel cooler and fuel pump and still have the sheen.  Can anyone help me wiht ideas on how to troubleshoot next steps?
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Royalboater
Guest Contributor