Welcome to the seadoo forum. Here is some information on running on the hose.
Running on the hose
You can hook up the hose to the 2 stroke Rotax engine, and have it run for up to 5 minutes to flush it out. Connect the hose and start the seadoo. Turn on the water after it is started. Turn off the water, than shut down the seadoo. Always do it in this order.
There are two places you can connect the hose, one is next to the fuel tank filler behind the drivers seat, It has a cap and a chain attached to it so it isn’t lost. The other is at the stern in the top right corner. You can thread a hose into this fitting too but I prefer the top one, under the deck lid. This way you don’t have to pinch off any feed lines or regulate the water going to cool the engine.
Attach the garden hose, Leave the deck lid open with the blower running, so you can vent the compartment and allow the garden hose to fit properly. This also allows you to see the engine while it is running to check for cooling leaks. Start up the boat, turn on the water, in this order. If you have too much water flowing, it will run out the rear water connector and not over fill the engine with water. Be sure water is coming out the “Tell Tale”.
You can run it for about 5 minutes at IDLE which should be at about 3000 rpm’s. When you’re done, turn off the Water FIRST, then pull of the Lanyard to kill the engine. This way it won't allow water to back flow into the engine through the exhaust due to no back pressure from the engine not running. The bearings and seals on the impeller jet pump are cooled from being in the water. When it is on the trailer it doesn't have that cooling effect so they will get hot after about 5 minutes.
I pre start my seadoo's, dry before I leave for the launch, but just for a second or 2 to be sure it will start at the launch. Peace of mind is worth a lot.
Karl
