Help, Maristar won't start

[dunesday]

Yesterday I was out with the family on my '02 Maristar w/ 8.1L. Late in the afternoon, the boat refused to fire. It had ran perfectly all day. I filled the tank earlier in the day and had wakeboarded and surfed for the better part of the day. I charged the batteries the previous night as well. I checked the fuel rail and found pressurized fuel via the schrader valve (replaced the fuel pump last year after running the tank dry OUCH $$$)

The engine turns over rapidly as normal. The clip on the safety switch is attached. I tried putting the boat in neutral and pumping some fuel to it. It has never needed that. I am completely stumped. It went from perfect to this with no apparent event in between ??

Any thoughts or suggestions are appreciated

[oldairboater]

Got spark to the plugs? You have fuel to the rail but is it firing? Got to have fuel, fire, compression, exhaust----and this all has to be done in time. You semi eliminated a fuel problem. Now eliminate whether it is firing. Just my way of doing things. Pumping the throttle on a fuel injected engine is usually a waste of time unless they have added accelerator pumps to fuel injection.

[dunesday]

Sooooo, went out to the boat and pulled a spark plug. Turned over the engine and there is spark. I put the plug back in and........ The boat fired right up ???????????

The only thing I "changed" was: Oil was low at the lake,, still on the dip stick at the "add" line. I put in a quart and a half on the lake. Boat still did not fire after repeated tries. Is there a low oil level / low pressure safety ?

[oldairboater]

Gremlins or safety switches? I have no ideal about a low oil level switch on your model boat but my generator and lawn mower have one.