I believe the telltale exits the back on that Seadoo where it's difficult to see.
My Kawasakis have the exit on the right rubrail near my foot. My wife's ski always had a strong stream but mine was about half and I had to keep an eye on temperature. That water was often steaming and I couldn't put my foot in the stream.
One day I blew a hole in my rubber exhaust connector. The cooling system is split with water flowing from the pickup in the jet pump to the stator, head pipe & cylinder water jackets, and on thru the hull to the "pisser". Another path is injected into the hot gases where it cools the rubber connectors & fills the waterbox before exiting with the exhaust. That fitting was corroded and choked on mine until I reamed it out with drill bits.
No more cooling problems.
So yeah, it's important. I hope you've found your answer by now. Google & YouTube are helpful in pointing out model-specific problem spots.