OKay... initially when riding this ski I suspected that the siphons were leaking into the engine compartment. I checked the white tubes to make sure they were in place and eventually clamped off the siphon tubes to prevent water coming into the hull. NOTE: the hull plug was leaking but it was hard for me to convince myself the dirty water could get in past that plug. I spent a good deal of time checking the engine, replaced hoses, inspected the water box...... everything I could think of. So.... after 4 visits to the launch and about 1 hr of riding here is what i have confirmed.
The siphons are indeed leaking water into the hull. Here is how they do it. When the ski is going straight, they siphon water out of the hull, I am not sure of their efficiency. If I go straight I get very little water. When I turn the ski, a lot of water comes through the siphons. Left or Right turn... doesn't matter. I'll get a quart of water in there doing a 180 degree turn. I had the most difficult time trying to prove this. I'd ride for 15 minutes and see a little water in the hull. Then I would say, I'm gonna have some fun. After about 10 minutes of that.... the hull probably had 10 gallons of water or more.
Anyway, I'm gonna pull the nozzle and have a look. I need to do an oil change anyway. I may pull the jet pump while I'm there and have a look at everything. Wear rings looks good. Perhaps an inexperienced owner/mechanic wasn't quite up to speed.