I've got a '93 Kawasaki JH750. I've ridden it several times this year with no problems. Went out today (a little longer ride than normal), and it bogged down and stalled out while at full throttle. I was a good distance away from the dock, and there was no one else on the water, so I had to get back. It would crank back up just fine, but every time I got going it would bog down and stall out again. I had to do this many times to get back to the dock. It seemed that the longer I let it sit before cranking it back up, the longer it would run (which wasn't long) before shutting down again. Any ideas on what the issue could be? Thank you.