What kind of gear oil do you use in a seadoo jet ski?

For a Sea-Doo jet ski, it is recommended to use a synthetic gear oil that meets the manufacturer's specifications, typically a 75W-90 weight oil. Sea-Doo often suggests their own brand of gear oil, such as the Sea-Doo Synthetic Gear Oil, for optimal performance and protection. Always refer to your specific model's owner’s manual for the exact requirements and guidelines to ensure proper maintenance.