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  1. #1

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    Catastrophic failure of supercharger

    Just changed the ceramic washers on 2006 RXP. Used the RIVA metal clutch washers and new mcmasters spring washers (5). Torqued shaft nut to 22 lbft as per instructions and red loctite. Did not have the tools to check slip. Also installed a bosch blow off valve. Ran vacuum line to the drilled out nipple on the intake.

    Before failure pic.



    Ran seadoo 4 days later for about an hour. Everything was going great, same RPM as before service. Then lost boost. Some rattling noise coming from the supercharger. uhoh. Towed back to launch ramp. (I have shut off on water).

    Pulled the SC today, and this is what I found.



    Shaft nut had come off. The bolt is clean as well, ie no sign of the red loctite. Everything is still in the engine except for one clutch washer. Obviously, I had done something wrong. Questions are :

    1. What did I do wrong?

    2. Any way to clean out parts besides pulling the engine?

    3. Good time to upgrade to X charger?

    Thanks for any helpful insights.


  2. #2
    Moderated
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    you seriously did not set the slip????


    imho you asked for it.

  3. #3
    If i knew,...I wouldn't ask sea-one's Avatar
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    WOW,..huge problem .you probably bought a motor...if not,you will if you run it again.

  4. #4
    Work Harder, Millions on Wellfare Depend On Us! ultramaxracing05's Avatar
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    did you clean the threads with solvent/acetone before adding the loctite? I dont see a sign of loctite no where, Not to rain on the parade but craftman got torque wrenches for less than 30 dollars.

    Sucks to see that happen man, not a good feeling,

  5. #5
    Work Harder, Millions on Wellfare Depend On Us! ultramaxracing05's Avatar
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    also get rid of the blow off valve they only add more wear to your clutch washers.

  6. #6
    Mod less, ride more! troyheb's Avatar
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    Quote Originally Posted by izz0 View Post
    you seriously did not set the slip????


    imho you asked for it.
    +1 NFW

    You have to set them things up right. If you did not have the tools to do it correctly, ask for help. There is probably someone here that lives near you that would have been willing to help.

  7. #7
    Michigan sn-95's Avatar
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    If I understand this correctly, you added all new Mcmaster washers. Those are not identical to the oem washers. Your slip could have been considerably higher than you were expecting.
    Sorry to hear about the failure bro, that really sucks.

  8. #8
    A smart admits!A wicked excuses!An idiot insists! mitsakosgt's Avatar
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    Pull the pto out and clean it carefully.If you dont find the parts you lost take the engine out for more cleaning.I had the same problem on a RXT-X.The sc parts where at the middle of the sump so I opened the engine to get them out.

  9. #9
    Nothin' better than Doo'in it! BigDaddyRXP's Avatar
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    With 5 brand new McMaster washers, that clutch was more than likely locked down... or damn close. Expensive lesson learned here

  10. #10

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    Thanks for the feedback. I even appreciate the harsh words. Hopefully it will help the next person who decides to do this themselves that they need to be 100% clear on what they are doing, and have all the tools around to do it.

    ultramaxracing05 - I cleaned it off as best I could, but I wonder, because there's not even a small bit of residue on the shaft. Only other thing I can think of is I used some loctite that was too old. or the wrong loctite. 262.

    sn-95 & bigdaddyrxp - i made a wrong assumption about those mcmaster springs . . . that they were just a higher quality replacement for the OEM. I probably would have discovered this when I checked the slip moment which I did not do.

    mitsakosgt - project for next week. that sounds hellish. not really what I wanted to do in the middle of summer, but hopefully won't take too long. Is there anything to watch out for as you're taking engine apart? (besides everything?) like any special tools you'll need or some maintenance items to change while you're in there? my engine has about 50 hours on it.

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