Why does one cylinder of my Sea Doo continue to foul causing a no start situation?

A fouled cylinder in your Sea Doo can be due to several reasons, including fuel issues, oil contamination, or improper spark plug function. It could indicate that the fuel mixture is too rich, leading to excess carbon build-up, or that the spark plug is failing to ignite the fuel properly. Additionally, a malfunctioning injector or carburetor can contribute to uneven fuel distribution, causing one cylinder to foul. Regular maintenance and diagnostic checks are essential to pinpoint and resolve the issue.