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]

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?

[Royalboater]

https://drive.google.com/open?id=0B_-uhFBbt9scRFdKcFFUWjFpWTA
Here is a video of the exhaust.