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  1. #1

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    Question Need help sea doo 800xp NO SPARK!!!!!!

    Green hulk buds,

    having and issue with my 1997 sea doo 800xp i have changed stering harness, computer (MPEM). We tested the stator and it gave out power. Put a brandnew fully charged battery and without the key in the ignition it drained my battery. Going crazy with this issue if you have any feedback please provide. What should i test? thanks


  2. #2
    flyin' the friendly skies airbornexp's Avatar
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    have you checked the coil? thats the first thing that I would have changed before I blew all that cash on the other parts.

  3. #3

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    how can i test the coil?? thanks

  4. #4
    Joe Stang's Avatar
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    I would also check your ground. and the fuse for the coil.

  5. #5
    flyin' the friendly skies airbornexp's Avatar
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    +1

  6. #6
    "Tearing it up on the water" seadoobutch787's Avatar
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    Unplug the harness to the vts, that might be draining your battery if there is a short, this has happened to me on a 97xp the vts started on fire. Did you cut 1/4 inch of the plug wires off to expose newer wires? If not unscrew the plug boots and try that.

  7. #7

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    +1 for the ground check & remember the KISS (Keep It Stupid Simple) method.

    I also agree with checking your VTS as it definitely can be a parasitic draw and/or a short point that can cause all kinds of problems. I'm running with it disconnect on my 1998 SPX 787 because it was draining my battery.

    Hope you get it fixed.

  8. #8

    Thumbs up

    +1 for the small Ground Wire on the Rear Electrical Box (wiggle the wire to be sure it isn't internally corroded)

    Also, Check for the .3~.5 Volt AC Coil Trigger Pulse coming from the Inductive Sensor which is inside the Magneto Housing. The earlier 787's had a known issue with the Sensor mounting tab fatiguing which allows the Sensor to kiss the flywheel--- .... Dead Sensor

    The Trigger Pulse can be checked on the Magneto side if you have the proper wire harness adapter tool (before the MPEM) or on the Coil side where it plugs into the Coil pack (after the MPEM)

    Here is the total test procedure Copied-n-Pasted from my Notes--pls. X-cuse the Caps...

    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

    787 MAGNETO and TRIGGER INDUCTIVE SENSOR OUTPUTS


    NOTE: ALL VOLTAGES and OHM READINGS ARE APPROXIMATE,
    YOUR READINGS MAY VARY


    >>> WITH THE 6-PIN WIRE HARNESS P/N 295 000 136 CONNECTED
    BETWEEN THE MAG COVER PLUG CONNECTOR SIDE and MAGNETO WIRING HARNESS CABLE:


    TESTING INDUCTIVE IGNITION TRIGGER SENSOR OUTPUT:

    >>> SET VOLTAGE RANGE ON METER TO LOW RANGE 10~20 VAC
    and “HOLD BUTTON” for HIGHEST VOLTAGE OUTPUT ATTAINED

    BLACK/YELLOW STRIPED WIRE=è WHITE WIRE= .37VAC TRIGGER SIGNAL WHEN ENGINE IS TURNED OVER

    >>> SET OHM METER TO LOW OHM RANGE

    BLACK/YELLOW STRIPED WIRE=è WHITE WIRE=256 OHMS
    TESTING MAGNETO FOR CONTINUITY OF COILS and GROUNDS



    >>> DIS-CONNECT THE UNIT MAGNETO WIRE HARNESS FROM WIRE
    HARNESS TOOL---KEEP THE WIRE HARNESS TOOL CONNECTED TO THE MAGNETO COVER PLUG-IN

    >>> USING AND OHM METER IN 20 OHM LOW RANGE RESISTANCE SETTING:

    YELLOW WIRES #1=è #2= 0~.001 OHM
    YELLOW WIRES #1=è #3= 0~.001 OHM
    YELLOW WIRES #2=è #3= 0~.001 OHM

    ANY/ALL YELLOW WIRES TO GROUND BOLT SHOULD BE “OPEN”,, NO GROUNDS…



    >>> RECONNECT THE EXTENSION ON WIRE HARNESS TOOL TO THE MAGNETO WIRE HARNESS SYSTEM CABLE and KEEP THE OTHER END CONNECTED TO THE MAGNETO COVER PLUG

    >>> SET OHM METER TO 200VAC VOLTAGE RANGE

    >>> START ENGINE ON THE HOSE

    OUTPUT FROM YELLOW WIRES (MAGNETO COILS) ARE AS FOLLOWS:

    YELLOW WIRES #1=è#2=38.2 VAC
    YELLOW WIRES #1=è#3=39.2 VAC
    YELLOW WIRES #2=è#3=37.2 VAC

    (OR APPROXIMATELY SAME VOLTAGES)



    Run your ski at 3000 rpm with a digital voltmeter set to the AC scale. There should be no more than 1/2 volt AC with the ski running. If there is more than 1/2 volt, the rectifier is bad.




    --DvD

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