2004 Seadoo Supercharged sat for 10 years

See if the engine cranks over. If it cranks a little bit and then locks up, check the sc play again. It's very possible that the bearings are still bad. Just had a thread on this a week or two ago that I talked them through it where the sc would spin by hand fine but not in the ski and was the sc bearing.
It chunk chunks. Remove SC?
 
Yes, it can, at a minimum, eliminate it as the problem. It will definitely need rebuilt anyway which you can rebuild yourself or send it out to be rebuilt.
 
Yes, it can, at a minimum, eliminate it as the problem. It will definitely need rebuilt anyway which you can rebuild yourself or send it out to be rebuilt.
So if I pull the SC out completely, and I can't crank over the engine, what else is there? I don't want to spend money rebuilding a SC for a seized engine.
 
Move on to the next common reasons the engine will be locked up or not turning over properly which is timing chain, bendix, flywheel bolts, bearings, etc. Supercharger bearings is at least 20 to 1 more common than anything else with the exception of the pump bearings but you've already removed the jet pump.
 
Trying to get the retaining bands off the back exhaust so I can slide it back. Too freaking tight to get in there with any amount of force to remove them. Anyone have any tricks? This ski has now seen my blood.
 
You don't need to take them off, just slide them forward and there will be enough room.
Spray the water box with silicone spray under the band to make it easier to slide the water box under the strap.

The strap will come off easy but is a real pain to put back on. Do not go there.
 
Spray the water box with silicone spray under the band to make it easier to slide the water box under the strap.

The strap will come off easy but is a real pain to put back on. Do not go there.
When I was out there yesterday I was wondering if the waterbox even needs to be moved at all.

But in trying to slide the band back and forward yesterday, it won't move more than a 1/2 inch forward so I can slide the box backward till it hits the hose connector towards the motor.
 
What is your objective trying to remove the supercharger?
If you objective is to remove it so you can crank the engine over, pull the supercharger back about an inch, try to turn the impeller nut by hand. If you can turn it, since the gear will no longer be engaged with the flywheel it should have no impact on the ability of the engine to turn.

If you can not turn it, the supercharger is seized. You will need to move the box about 1-2" toward the back of the jetski to pull the supercharger the rest of the way out. You may have to rotate the supercharger body to get the clearance needed to pull out.

As noted previously it is not hard to disconnect the strap but is very hard to reinstall it. See the link below.
The reinstall it I had to remove the large hose coming out of the water box (not easy to pull off) to provide access so I could connect the end of the strap closest to the drive shaft as the final connection. Soak the water box with Windex under the strap so it will stretch easily when you reinstall it.

To remove it I used a long handle weed removal tool to push down on the metal ring on the end of the strap furthest from the drive shaft to unhook it from the bracket on the hull.

https://www.greenhulk.net/forum/personal-watercraft-performance-skis/sea-doo-pwc-performance/sea-doo-how-to-faqs/4430-how-to-making-a-water-box-strap-installation-removal-tool
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