Ok, so I hate when I read through these posts and they just stop w/o a solution to the original issue. The boat is now running like a champ (and will hopefully remain that way for a while).
My issue of no-start was traced to a failed high pressure fuel pump. By the time the pump was replaced, I had done a full tune up and then some. I had installed the following: New plugs, new plug wires, new distributor cap and rotor, new ignition coil, and new fuel pressure regulator. The boat wouldn't start until the pump was replaced, but I am not certain that the pump failure was due to anything that I had replaced. I am more and more thinking it was due to a venting issue.
When I was taking the boat out for the first time after getting it back, I put 10 gallons of fuel in it. While out on the lake after I had pulled the kids on the tube for a while, we took a break out in the middle of the lake. I tried to remove the gas cap as to look at something and I could not budge it. I believe there was a vacuum on it and it was not allowing the tank to vent. This is the perko venting gas cap that I mentioned above. I had already ordered the cap a few weeks prior and it actually happened to come in the mail that day. After comparing the new cap and the one on the boat, I realized the rubber gasket that went around the inside part of the cap was missing. This allowed me to screw the old cap tightly down onto the fuel fill fitting and I believe it prevented the system from venting.
I installed the new cap and there is now a noticeable gap around the bottom of the cap where the venting can take place when necessary. No issues since then and I have been out 7 or 8 times. If things change I will update this thread.
