Hi I'm not sure if this is in the write spot for this post but I am in need of some assistance to diagnose what happend to my ski. I was riding around the lake for the first time after buying this ski and then all of a sudden I lost all propulsion but the motor still starts and revs. After being towed back to the ramp I loaded it up and went to town ripping the impeller out and jet pump out as well. I'm not quite sure what I'm supposed to look at but I thought maybe something got caught in it causing it to stick but not so much luck. I did notice the impeller was causing grooves in the plastic wear ring. It was also making a really loud metal clanking noise when started out of the water befor I ripped everything out. Now that the drive shaft is out there's no noise. I'd be grateful to anyone with any knowledge for this problem. I'm lost on what to do next. Thanks in advance.
Branamoia, yes you posted in the right spot.
Thanks for posting pics, this helps a lot in diagnosing issue. I'm quite curtain your thrust problem is that the splines in your center shaft have failed. Try inserting the pump shaft and turning it. See if it jumps along or turns motor over. Also see how much back and forth play there is in the splines. They should fit snug. Clean the rust and debis from the shaft first. There probably is still quite a bit in the other end as well.
I don't like the cheap plastic wear rings. They fail quickly and need frequent replacement. Check the pump brgs for side and end play by trying to wiggle the shaft in the housing. Also turn the shaft and check for any roughness in the brgs. Should turn smooth as melted butter no catching or grinding feel.
If pump brgs are ok, the shaft splines look good I'd replace the center support brg/shaft and your wear ring. After that Before you put the pump assembly back in measure the clearance of the Impeller to wear ring. It should be under .018" if it's above that you'll also need an Impeller to tighten the clearance or risk cavitation problems.
All your parts can be found at Babbittsonline for a new ring. Part number 6cr-r1312-00-00 or eBay for used.
SBT or wsm for shaft and seals.
Impros for Impeller if needed. Solas Concords work great for your application.
P.S. the metal clanging sound was probably the impeller rattling on the plastic ring.