dry fuel cell

Looking for advice before I go down the wrong path.

New to me 1996 super Sport.

Boat sat for 6 years. Before taking boat out I changed all fluids, impeller. Started up and after a couple of minutes in ran great. Took it out the next day and it ran great for 2+ hours. Then I decided to take it a little faster, went about 32 mph for 2 minutes and noticed the RPM's randomly increasing and decreasing with no change in speed.

Thought it might be an old clogged fuel filter so I changed it. FCC was full of gas when doing the change.,

Now I can not get any fuel into the FCC. Cycled the key several times and it is bone dry. I hear a "click" when turning the key part way.

Where should I begin. I have the floor pulled as I read somewhere that the random RPM deal is one sign of a bad anti siphon, but I don't want to dive in guessing.

Thanks,

There did not appear to be a change in speed, the engine didn't even sound different.

I was hoping to check some things off prior to simply buying every piece involved in the fuel system.....

Looking at the poor mans GT40 thread is nice, however, it is too thorough. I have been reading through it and can't find a similar problem.....

gigm94 wrote: There did not appear to be a change in speed, the engine didn't even sound different. I was hoping to check some things off prior to simply buying every piece involved in the fuel system..... Looking at the poor mans GT40 thread is nice, however, it is too thorough. I have been reading through it and can't find a similar problem.....

The dash on these boats don't have the best wiring and issues are common. I don't think what you are seeing with your tach is related to the FCC issue. My tach jumps around a lot on my 95 sport.

I don't believe in throwing parts at a problem either but the relays are cheap, about 15 bucks and it's good to have spares, it's an easy change and common failure point. So it's something worth trying. For $30 it's worth replacing both relays.


As Gary said the FCC is basically a small fuel tank the holds filtered gas for the high pressure pump. If it is dry then your issue is probably the Low Pressure pump or a blockage in the line between the pump and the FCC.

The are several thread in the GT40 thread that discuss LPP failures.

Beyond that the GT40 service manual discusses lots of options for diagnosing issues.

Edit: Realized you changed the FCC so I removed that part.

I think he was going to do that Kris,he had another thread going on how to get to the tank on a Super Sport. Never heard how that worked out though