weeds in jet

This weekend I tried taking my spark trixx out on a lake and unknown to me the entire launch area was filled with weeds below the water. I made it half way through the lagoon before I got the high exhaust temp warning which made me pull up to shore and pull the weeds out. This has happened to me...

Here's the deal. My twin 1997 pumps are full of weeds and I can't figure out how else to clean them out. Motors will start, but will not wind up to full speed in the lake............just stay bogged down. I have a set of socket wrenches and the factory shop manual, complete with set-by-step...