Oh hell no. LOL. Not when I did it. Accel injectors from Summit Racing for me. Summit also has our low and high pressure Carter fuel pumps. Hope Prince2e did something similar.
I've got a 1995 5.8Fsi that had this. New injectors did the trick for me. I've also seen where the low pressure pump gets super hot (most likely partially clogged) and has problems on hot starts.
Under the upper plenum (manifold).
Just need an OBD tester. They are pretty cheap on Amazon. Here's the one I use. Is your boat OBD 1 or OBD 2? My 95 is OBD 1 and OBD 2 was already around in the automotive world, but the boating industry has a tendency to lag behind...
This guide was put together by the PCM guys, but 99% of the info is relevant to you. I've got all the VP hard books for our engines, but this is more handy. Here's my dropbox link. https://www.dropbox.com/s/vf59bqelcsjfefz/Pro_BOss_GT-40_Service_Manual.pdf?dl=0
Carb cleaner or brake cleaner. There are a number of vacuum lines on the underside of the intake plenum that can be hard to see that can have a cracked vacuum hose or dry rotted vacuum caps. You don't need to spray tons, but if you shoot it in a certain area and your idle changes, you have found...
The only problems these ECM's sometimes run into is leaking capacitors that can easily be replaced. I pulled mine apart to inspect and take photos of all of the capacitors. I had none leaking and the inside of my ECM was spotless. But now I have a spare set of capacitors. These ECM's can be...
The marine dealer is putting on the marine price. Some parts unique to boats - that's justified. Your IAC is a common automotive part. Nothing marine about it at all. I typically use Rock Auto for parts like this.
If you never ran it with the water in the oil, do an oil change and new oil filter, put a new battery in it and run it for a bit. It's probably fine. As far as selling it goes, it's probably not even worth bringing up.
