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I go out of my way to run 92/93 WITH ethanol for jetskis. I don't to anything extra to them when they sit. I have zero carb issues with my own stuff even after sitting all winter. My sleds also sit all summer with your typical 10% e

Looks like someone added powervalve later on in life.

Not the answer you are looking for, Better off left alone IMO. Asking for trouble cleaning it. I'd put a little oil under the cover to attract any moisture that collects inside, and leave it at that.

Price drop and added parts

What do these fit?

Updated

760 stator still is superior. Cleaner signal

Psi had a few difference cyl spacings from what I've seen with the Polaris based twins. Did they have a poo based spread bore triple as well? I can only image they would to use their big boy cylinders on. But then again I did sell a spread bore twin case to a guy who wanted it for a triple...

Price drop let's get these gone. Will make a better price if you buy both!

Added items and price drop on others

You should use this to test carb pop-off, and let us know if it works. Lol

How much for the flame arrestors

Ttt

Agreed get rid of that center mount, those belong in the couches that have SMC engine plates. Oem couch mounts is the only way to go!

Damn that's a shame. It looked pretty neat. mayve can figure out what thread it is, and maybe can find something to adapt it with from mcmastercarr?

Updated with better pictures of the 62T cases. These would be great for trenching or repairing if you can do it cheap enough. They had piston skirt failure, not crank failures, so bearing surfaces still nice.

Grab your spark plug and overlap the threads on the plug with the tool, see if threads fit together or if thread pitch/count is wrong It's possible that just the first thread got a little banged, if you don't have a die you can use a tiny file and try to clean it up.

Work with it, the Rok isn't that short of a hull. IMO it's pretty long still for a freestyle ski. its hard to tell for sure, but that does look like a 65v 5 degree reduction nozzle. Try looking for a 62T nozzle setup if you can't get comfortable with it after some decent tray time.

That does not mean it will mount on a Yamaha pump. Just trying to help you out. I would suggest you Check physical fitment before selling it to someone planning to mount it to a Yamaha oem pump.

Can you post a picture of it mated on an oem Yamaha 144 stator?