I have a 07 yamaha fxho with a total of 22 hours on it. The last time when I used it, the engine was running very rough at low rpm until it warmed up than it ran perfect. The following week I installed a set of new sparkplugs and one of the plug had water on it. The jetskii was never rolled, left out in the rain or abused in any way. I called yamaha customer support and basically was told that because I had it for over one year I was on my own. Is there any way water could enter one cylinder others than thru a blown head gasket or cracked head? Is it possible water could get in thru the fuel injector body?Any suggestions would be greatly appreciated.