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  1. #1
    thompsdw's Avatar
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    Diagnosis on this Supercharger Failure

    What do you guys think about this one? The guy actually rode it home with nothing more than RPM loss. Is it a certainty on this type of failure when the veins are worn that the engine is toast? He says he can rotate the engine ............
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  2. #2
    EZ Dock of Long Island Shibby1485's Avatar
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    the ski sank...

    the bearings failed... and the axial slop wrecked the impeller and housing...

    the bearings then locked up and the shaft stopped short while the overdrive gears sure as chit weren't stopping and the SC drive gear snapped off the shaft... or the shaft jsut got to sloppy and the teeth binded and broke the gear... which gear pieces are now in the bottom of the pto cover and oil passage to the front pump

    seen a handful of them go that way... one of them destroyed all the teeth on the ring gear set and chewed the magneto and stator apart

  3. #3
    SeaGoat's Avatar
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    Lot of corrosion on that thing. Definitely didn't get good maintenance and was used in salt water.

  4. #4
    EZ Dock of Long Island Shibby1485's Avatar
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    looks like an 06+ sc kit i think? looks like it from the pics but can't say for sure ... inside an 03 or 04 SC housing

    what year housing is that? or rather what part number back housing... the old original red one that needed the spacers between the housing and the cover for proper gear offset? or a mid-late 04 red housing that didn't need the shims between the rear housing and PTO?

  5. #5
    Whats that whistling noise? jtskier11's Avatar
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    That thing is corroded like a SUMBITCH!!

  6. #6
    thompsdw's Avatar
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    I am looking at this one to purchase. It is an '04 charger (from what the seller tells me). He said that the ski simply lost RPM and he drove back to dock. He rode it in fresh water, no salt. Engine is very clean otherwise. Of course, he is the second owner, so who knows what the first guy did to the ski.

    If the price was right, would you still pick this one up? What are the chances of bigger damage (oil gears, etc.) from this type of failure? Need advice...........

  7. #7
    Whats that whistling noise? jtskier11's Avatar
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    Quote Originally Posted by thompsdw View Post
    I am looking at this one to purchase. It is an '04 charger (from what the seller tells me). He is emphatic, that the ski simply lost RPM and he drove back to dock. He rode it in fresh water, no salt. Engine is very clean otherwise. Of course, he is the second owner, so who knows what the first guy did to the ski.

    If the price was right, would you still pick this one up? What are the chances of bigger damage (oil gears, etc.) from this type of failure? Need advice...........
    Thing looks bad. Id give him a wooden nickel!

  8. #8
    Having Fun jp1300r's Avatar
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    Listen to Shibby. There is no drive gear on the supercharger. Do you know where it is?

    If you don't have a spare engine, I would pass on that ski. Unless you are buying it for like 500 bucks.

  9. #9
    EZ Dock of Long Island Shibby1485's Avatar
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    you know you have rust on the shaft of the SC... which means water was inside the cases/ milky oil / etc...

    it either sank at some point
    if it's a 215 HP model, the intercooler could have failed and thus spraying water in the motor which could get into the crankcase if it was a bad leak in the IC

    that ski was absolutely in salt water at some point, that's evident i would think.. whether him or another owner

    here's what you know is in the bottom end... WATER, Ceramics, needle bearings, and a SC drive gear in multiple pieces.

    you are absolutely going to be replacing the oil rotors, shafts, and housings.. front and PTO

    you are gonna be replacing the SC housing, impeller, and a new SC kit (ie buy a complete used SC that's good, it'll be cheaper)

    now the question is when was the ski last run? ... is there still oil in the crankcase?

    how much water got in the motor? did it ever hydrolock? did it by chance bend a rod slightly? are the bores rusty? ... these are the unknowns..

    but i would say the facts are new oil pumps, covers, rotors, new SC... and you wont know until u open the motor if the crank ring gears are damaged (pretty likely) and if any of the charging system components were damaged.

    an 04 SC ski in running order they are selling in the price range of what... anywhere from like 4-5500 depending on condition and hours...

    is this an RXP or a GTX SC? u definitely have your work cut out for you, but i know you like projects! this is gonna be an iffy one of will u be upside down in the project or break-even or what depending upon the final price.

    u know you have a good hull and good pump and good cases and good cylinder head and electronics if all else fails and u need to part it out... add up the actual value of it in pieces if you parted it out as is and dont buy it for anything more than that this way it's either a break-even or winning situation

  10. #10
    Site Admin Green Hulk's Avatar
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    When the gear breaks it can cause quite a bit of damage. The double row gear (flywheel) will probably need replacing and the timing chain too. Make sure you retrieve all 40 needle bearings from the engine when you split the case to change the timing chain.

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