03 pcm 5.7L Excalibur 330 engine

[The_Jake_McNasty]

What is the most likely reason or order in which i should look to find why there is gas getting into the bilge.

[bturner]

With this serious of an issue I would start at one end and work my way to the other replacing anything that looks remotely suspect but then again I have a boat catch fire on me so I'm a little sensitive to gas in the bilge.

Likely causes will depend on...

• How old the boat is.
• How the boat has been maintained.
• What maintenance schedule has been followed and performed.
• When do you experience the problem. i.e. when the tank is full, near empty, any time, boat is hot..... etc.
• Has any other repairs recently been preformed on the boat that could have moved/damaged the fuel system.

Most likely causes depends on the above but things like a cracked fuel tank, bad seals on the fuel filter/water separator or leaking vent lines or fuel fill hoses come to mind.

[JayG80]

Known issue on my 2002 Ski Nautique is gas leaking around the wires on the top of the FCC. That's a quick and easy inspection to see if the epoxy is cracked and gas is leaking. The design was changed by 2006.

Here is the kit to fix https://nautiqueparts.com/repair-kit...trol-cell-fcc/