Kawasaki STX 15F Jet Ski Water in Hull - Finding and Fixing the Problem

Kawasaki STX 15F Jet Ski Water in Hull - Finding and Fixing the Problem

I've been riding this machine since 2012 and it finally developed a water leak. It wasn't a fast enough leak to sink the machine in minutes, just a slow leak of about 2 inches of water per hour entering the hull.

What alerted me that there was a problem was a vibration noise at half throttle that gradually escalated to 3/4 throttle. As the noise happened more frequently, I lifted the seat for a look and noticed some extra weight in my hull.

Lucky for me, this incident took place at my cottage where we have a PWC port. I quickly parked on the port and pulled the drain plugs. Once the water was out of my hull, I put the drain plugs back in and went for a rip. No more vibration noise until I had been riding for a good 20 miles.

In this video, I will be running the machine on the hose while I tinker around in the hull looking for water entry.


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00:00 introduction
00:53 starting it on the hose
01:36 shutting it down to look for clues in the hull
02:05 trail of water discovered
02:35 flow of water spotted under coupler
03:12 clean-up of calcium build up on muffler side
03:37 Permatex Ultra Copper gasket maker solution
04:32 reconnected coupler after applying gasket maker
05:35 using contact cement to fix a traction pad
06:28 re-testing Kawasaki on hose
06:57 calcium build-up discovered on manifold side of coupler
07:15 how I moved the coupler off the exhaust manifold
07:44 putting it back together after applying gasket maker
07:55 moment of truth. Testing my gasket maker fix
08:55 no more water leak. Summary of steps taken to fix it
09:45 Conclusion and result of lake test




Inner Light by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/...

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