How do you flush motor of waverunner?

you must first put on your yamaha hose adapter for your garden hose. then without turning the water on plug the hose into the yamaha. there should be a place to put the hose in the engine compartment. then start your engine the turn the water on. make sure the water never on when the engine is off. let the pwc run at idle speed for 240 seconds (4 mins). then turn the water off and shut down your engine. gracias