It’s important to get any contaminants out of your Sea-Doo exhaust system, especially if you typically ride in a saltwater environment (then flushing is strongly recommended after every ride).
To flush the exhaust system, hook a garden hose up to the connector located at the rear (port side of the stern) of the watercraft. DO NOT OPEN WATER TAP YET! Start the Sea-Doo engine and then immediately open the water tap. Run the engine for 90 seconds at idle and ensure water flows out of the pump while flushing. Next, shut the water off and continue to run the engine at 5000 RPM for 5 seconds, then shut the engine down.
Drying out the exhaust system is especially critical in cold weather areas. Freezing water in the exhaust system can cause extensive damage to the exhaust manifold. In order to complete drain the system, blow compressed air at 55 PSI (379 kPa) into the flushing connector the hose was attached to until no water flows out of the jet pump. This will ensure all water has been removed from the watercraft’s exhaust system.
If you own a SWITCH Pontoon (does not apply to SWITCH Compact models), you'll need to flush the exhaust system drain plug. The process for this procedure is outlined in your SWITCH Operator's Guide and almost identical to the steps outlined for flushing the exhaust system above. With your SWITCH, start by opening the exhaust system drain plug. Then proceed with the same steps and order as previously outlined.
To dry the SWITCH exhaust system for winterization, open the exhaust drain plug and repeat the same steps using the flush connect to inject pressurized air at 379 kPA (55lbf/in2) into the system until there is no more water flowing from the jet pump and exhaust system drain. With all water removed from the system, you can remove the special tools and close the exhaust system drain plug.