We just bought a 1997 Seadoo XP Jetski we have had it out a few times and it started and ran however it would just simply quit on us.. Since then we changed the plugs added a new battery and cleaned the fuel filter because we were having trouble getting to start..After we did this it started back up then rolled in the water several times but flipped it back over quickly.. . Now after starting it the plugs immediately foul.. The plugs had water in them could there be water in the engine if not then what is our problem were at a loss?