For the best results, always check your owner’s manual to see if there are specific methods or guidelines to follow for emptying water from your PWC. Otherwise, you might consider trying some of the following methods.
The first step to emptying water from your Jet Ski or PWC is to tilt the handle back to drain as much excess water as possible. While you do this, run the engine for 30-second intervals to flush the system. You can also use a manual or electric pump to get water out of the hull. To get water out of a PWC motor or engine, try carefully removing the spark plugs and using a vacuum to suck the water out of each spark plug hole, as well as the exhaust. Afterward, reinstall spark plugs and continue to use the vacuum at the exhaust exit to help the engine expel water. You may have to repeat this process several times to rid your motor of water completely. You can crank the engine briefly while removing the water, but only for short intervals. If you run the engine without any water in the system at all, you lose the lubrication that keeps the metal parts from damaging each other.