no-start

Hello all, thank you in advance for reading this. My problem is difficult restart after running fine, stopping to enjoy some fishing/swimming, and upon restart the engine turns over fine but restart is difficult, takes multiple attempts before it starts. This initially happened end of...

Can anyone help? I have 2-94 seadoo xp's. One runs great but the other starts great on the trailer but when I put it in the water it will not start and fouls out the plugs, even if I replace the plugs it will still not start. Cranks fine and the plugs still continue to foul out. Even starts on...