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  1. #1

    Join Date
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    Will pay to solve problem- rx running one cylinder

    This is one of those I am about ready to give up on...
    2000 Seadoo RX...
    Previous owner did a top end on it.

    Ski is only running on one cylinder, it was only doing 4200RPM.. pulled rear plug lead, no change, pulled front plug lead, ski died... So its only running on FRONT cylinder.

    Pulled carbs, went through, put back on, same problem.
    Swapped to different set of carbs. Same problem
    Ran fuel line direct from tank output to carb. Same problem
    Swapped MPEM, same problem
    Swapped complete rear Ebox. Same problem.
    Swapped coils. Same problem.

    reeds look good.

    With rear coil on plug ONLY, if i pump gas quick the accelerator pump squirts, ski will fire off for a second or two.
    Tried a little starting fluid(yes I know terrible), it wont fire on fluid... thats one thing really stumping me.

    Front cyl fires no problem, runs on that cylinder no problems.

    Rear cyl I can NOT get it to run on!

    Anyone have ideas???


  2. #2
    Do you have spark on the rear cylinder? What's the compression? Are you 100% sure the flywheel is the right one? (if the PO put a 1998 flywheel on it, it might do this..)

  3. #3

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    Yes forgot to mention.
    Compression 150-150.
    And yes spark on both cylinders.

  4. #4
    Kmorningstar_rxp's Avatar
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    Piston facing the right way? Seen people put them in wrong, arrow towards exhaust

  5. +1 by:


  6. #5

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    ^Yep piston is facing right direction.. checked that as well!

    Thanks guys keep the ideas coming!

  7. #6
    Kmorningstar_rxp's Avatar
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    Check the wire boot on rear cylinder, had someone trim one back but never got it seated all the way.

  8. #7
    Kmorningstar_rxp's Avatar
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    Spark on both cylinders... Check vacuum line for clogg, check the case too

  9. #8
    GGG's Avatar
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    did you swap coils and wires or just coils? could be a bad wire like said. it will show spark on test but may not complete the jump under compression.

    I had an intermittent miss on my xpdi and got home to notice the spark jumping through the boot to the cylinder head

  10. #9
    SURFnTURF's Avatar
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    Why did he do a Top End ? Possible water damage and now twisted crank ?

  11. #10

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    Swapped complete coil. And also did the trim back. It's got spark.

    Whatdo you mean check case?

    It didn't have water damage.

    Swapped whole coil and wire

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