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  1. #1

    1996 Polaris SLTX 1050 broken piston (Mag) battered head

    Can someone try to explain to me what went wrong with my engine? I have a 1996 SLTX that has a broken piston on the Magneto side and the head has a bunch of dents in it. Is this from a carb issue or did something get in the engine? I lost a washer in the carbs the other day if that helps.Click image for larger version. 

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  2. #2
    Click avatar for tech links/info K447's Avatar
    Join Date
    Jul 2007
    near Toronto, Canada

    Was the lost washer allowed to get into the engine?

    The photos show 'foreign object damage'. It looks to my eye like a crankcase or connecting rod bearing may have come apart and the bearing pieces have been sucked up into the combustion chamber where they were beaten into the piston top and cylinder head.

    You will need to remove the cylinder and piston so you can inspect further.

    If the engine already has a high number of running hours or it has been many years since the last rebuild then a full engine rebuild may be prudent. If it is the original engine then it is twenty years old.

  3. #3 much for the 780? stimpsonjcat's Avatar
    Join Date
    Apr 2012
    Georgia - Lake Lanier - near 6TH
    Doesn't look like a washer to me.

    I agree with 447, something probably came up from the crank. Or it could be a piece of a ring.

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