Help... Seadoo Utopia Lunging/Cutting Out - water in fuel?

Hi, hoping someone can help me.

My 2002 Seadoo Utopia 205 with Merc 240EFI is having problems. I'm wondering if there's water in the fuel, but not sure.

When just above idle, the engine suddenly cuts out, then comes back, then cuts out. Sometimes it cuts out completely and I have to restart it. When it comes back, it lunges forward obviously, then cuts back again.

As I accelerate further I seem to be able to eventually get it past the lunging and then it will run perfect on plane mostly.

But if I open the throttle to max, it eventually cuts out violently, then lunges forward, cuts out, lunges, etc. - until I reduce the throttle again to midspeed. Sometimes it cuts out completely at speed too, and I have to restart it.

Thinking it might be water in the fuel, I drained the fuel tank through the fuel sender hole, hopefully I got out all the fuel. For the last bit I used a shop vac and sucked it up, but not sure if there's a hidden reservoir somewhere that I missed.

Next step is to figure out if the Merc240EFI has a fuel filter and a water separator. If so, can someone tell me where they are located, as I don't see them. I only see the fuel lines connected directly to the engine.

Help please... Is it water in the fuel, or something else?

Thanks in advance,
Andrew


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2002 Seadoo Utopia 205 Merc 240EFI
1997 Seadoo GTX
1995 Seadoo GTS