coolant leak

Just bought this 2006 RXP with 132hrs as a first PWC (from my dad) and it turns out it had a few issues… first, the rpm would only reach 7200 and it maxed out at 45mph (turned out to be disconnected hose from supercharger). Now that it gets up to 8300rpm or so it overheats in about 1 minute...

I have a 2013 seadoo RXP X 260 that I purchased used with a riva stage 2 kit on it. I’v put about 25 mins on it the one time I took it out with no problems. then I took it out with a buddy n went into the ocean to jump some waves was onli out for like 45 minutes but I did do a couple of full...