i have a polaris virage txi 1200 year 2002 PWC and it was running fine i just took itout yesterday and it is running very slow i brought it back to the dock and flipped it over to make sure there was nothing wrapped arroud the inside of it and it was fine when i flipped it over again there was gas streaks in the watter that came from it i looked and did not find any leaks but it still ran the same and it exhaust has white smoke coming from it i pulled the pluges and they where very black with carbon so i changed them same thing was still happing smoke and sluglish i looked at the plugs again and the new ones where all black with carbon any idea what might be wrong with it it has no carberator on it