Jet Pump Nut/Bolt Torque damage

[WaterChampion]

Hi,

I’ve done several pump replacements on 96 Seadoo GTI’s and I’m not sure if I should follow the manuals stated torque specs. It always seems like it’s too much. As you can see here from the photo, with it set to the proper torque, it has squished the plastic downwards so far I’m surprised it didn’t crack. This has happened on two Seadoos that I’ve done. Also the little square plastic washer backing nuts for the stacked shroud end up deforming and trying to rip the plastic when set to the specified torque. I’ve check the torque wrench on several other things and got a perfect click but on this it just keeps going, never achieving torque. Is it because the plastic is 30 years old? At this point I think I should just tighten them with some “umph” and call it done? It’s also interesting to me why this doesn’t call for LT 242…

Thoughts?

 

[lavasioux]

I always trust materials feedback over engineers torque specs.

 

[etemplet]

Torque specs are too tight for some Seadoo jet pumps. I've tried torquing a couple and it was always too much stress on the plastic. That number looks really high, I think I've done like 15 ft/lbs but don't quote me. LOL I with @lavasioux feed back. If you pull the wrench and torque doesn't increase quickly something isn't right. You're pump looks OK at first glance. Make sure you put large washers on the bottom. Always use blue loctite or whatever loctite you prefer.

 

[murphn8r]

good and tight with loctite. i havent had a bolt back out yet (knock on wood}