Try going to search in the upper right of the screen, and search on posts from milehighguy303. It was from March 2021. If you can’t find it, or have questions, I will relay it again for you and others.
The quick direction is to pull all three spark plugs, and use a powerful wet/dry shop vacuum to make a good seal on top of the spark plug hole, mimicking engine operation of pulling air from the air box, thru the throttle body, thru the intake manifold, and into the cylinders. Works even better if you have the rubber nozzle attachment with three different diameters, so you can get down into the valve cover instead of just on top of the cover, but use what you got. Get a partner to fully depress the throttle so that the fuel injectors don’t fire, and have them turn the engine over as if starting the engine. You move the vacuum over each of the three spark plug holes multiple times, sucking probably for 20 seconds at a time on each hole. Let the starter rest a few minutes and suck over each hole again while turning over the engine. You can stop when you aren’t coughing up water anymore. I hope you find it as helpful and successful as I did. You have additional work to do with changing the oil and filter, putting your spark plugs back in and safely starting the engine. Let it idle for a few seconds and accelerate slowly to a full throttle, not running the ski for more than a minute. Then you need to do the boil out procedure to get any water out of the crankcase, and change oil again. Change your spark plugs too, for good measure. It would be good to open your throttle body and spray some lubricant on the throttle valve assembly. I let my Seadoo sit with salt water in it for a couple weeks and damaged my fuel injectors, so I replaced those too. But I have ridden now for 100 hours since my water ingestion event in 2021 and have 350 hours total now.
