Hello everyone new to the Hulk and new to PWC this year. I bought a pair of 1999 Kawasaki STX 1100 jet skis this summer and it was great love them until I gernaded one of the motors. So I went in search for parts and 6-8 weeks later was able to put a new engine back together.something spun and I limped it to the ramp. awful smell of rubber burning and smoke took seat off and was a mess . turned out the coupler and the coupler attached to the impeller shaft were separated and engine would not turn due to this. I tapped the impeller side of the coupler towards the engine and bam it started back up. I replaced the driveshaft bearing housing and put it on the water today to finish the break in before season ends and after half throttle for 20 mins it spun off again and separated about 1/2 - 3/4 inch and here I am! what am I missing ?
Any help is appreciated