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  1. #1

    How much movement in supercharger impeller is normal? Video included

    I have a 2010 255 engine that I am running about 500 RPM too low. I'm only seeing 7500 RPM at wide open throttle.

    In the process of troubleshooting this issue, I wanted to check out the supercharger. If I grab a hold of the impeller nut, I cannot move it at all there is no slop. If I grab a hold the fins, I can turn it forward and backwards approximately 1/32 to 1/16 of an inch. I've included a video so you can hear how it sounds when I move the impeller.

    Does this seem normal?

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  2. #2
    Myself's Avatar
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    Sounds like you're referring to the backlash of the driven gear against the flywheel gear. Perfectly normal.

  3. #3
    Chester's Avatar
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    Normal gear lash.

    Chester

  4. #4
    Thanks Guys!

  5. #5
    RiverRat71's Avatar
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    Still could need rebuilding. The gear lash has nothing to do with the clutch washers & slippage. RR


  6. #6
    Site Admin Green Hulk's Avatar
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    If your 2010 supercharger has never been rebuilt it's waaaaay overdue.
    https://www.4-tecperformance.com/ind...oducts_id=5170

  7. #7
    ou812's Avatar
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    Why does that look like a 215 charger?... 6 blades = 215 8 = X
    This might be where your 500 rpm / 5mph went...

  8. #8
    Is this a 215 supercharger? Any other input?

  9. #9

  10. #10
    ncdoo's Avatar
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    Yes that's a 215 SCer.

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