787 blown engine problem

  1. M

    787 engine blown (98’ challenger 1800)

    I recently bought a 1998 seadoo challenger 1800 from a private seller. He swore up and down there were absolutely no problems.. when I went to pick it up, he started both engines for about 10 seconds saying he didn’t like them on out of water.. he refused to take it out the lake but promised if...
    • MH jefe
    • Thread
    • 787 blown engine problem 787 engine blown 787 engine rebuild 787 engine removal 787 engine wont fire 787 rotax challenger challenger 1800 98
    • Replies: 1
    • Forum: 2-Stroke SeaDoo Sport Boat Forum
  2. C

    787 pto cylinder seized??

    I have a 1997 challenger 1800 with the twin 787s. Was riding around at about 6k and the port engine rpms dropped to 5500 then back to 6k. Brought it down to idle and it died immediately. Got it home checked compression and the pto cylinder had zero. Mag had 150. Both had 150 last time I checked...
  3. J

    787 seized up - looking for possible reasons 1996 Challenger twin rotax

    Just rebuilt the cards on both engines and everything was working fine. This engine was rebuilt last year 2010 by a reputable dealer but seized again 2011 - looking for reasons why this would happen. Here is the problem trail. Used the boat for hours last week skiing & tubing. At end of the...
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