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  1. #1

    Going great one day. No start the next

    hey guys. got yet another problem with my 99 slh700 now. I changed the red purple wire to the orange wire last week and went for a test run. Ski was running great and starting great. The night after I wanted to go out again but the damn ski just would not start. She fired once on the first attempt but no joy after. pulled the plugs one at a time and have a spark. plugs are also wet when I pull em so must be getting fuel. I noticed I have no spark when I pull both plugs and ground em. But as soon as I put one back in I get a spark on the other. She did fire after I poured some fuel down both carbs but only after a good while so I think it was just coincedence. Fuel pump is also pumping cos checked that. Any suggestions anyone?


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Does this engine have the original ignition system, or the Update Kit?

    What is the part number on the CDI module in the electrical box?
    Check front and back sides for numbers

    Polaris Domestic (red) engine

  3. #3
    I'm pretty sure it's the original ignition system. The CDI part number is 4010448

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    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by aj1987 View Post
    ...The CDI part number is 4010448
    That is the Update Kit CDI part number.

    The GEN III ignition for two cylinder engines fires both spark plugs together, every time. Both spark plugs must be connected together (to the cylinder head). Otherwise, they will not fire.

    Use a multi-meter to check the battery voltage while cranking. It must be over 10.6 volts, or you will not have spark.

    Also remove and clean the battery negative cable, at BOTH ends. Make sure there is solid metal to metal contact.

    Next is to check all the grounds inside the electrical box, including the module and ignition coil tabs. Everything must measure zero ohms back to the battery negative post. Disconnect the battery positive cable while checking the grounds.

  5. #5
    OK thanks I'll get onto that and let you know how I get on tomorrow

  6. #6
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    Check your compression. On my Kawi 750, when I blew a piston , i was not getting pulse to the pump, hence no fuel.

    Your ski will almost always run the best just befor eyou blow it up

  7. #7
    Ok checked all the resistances etc and they were fine, comp was fine etc. Gave it to a guy who checked it over and found a small piece of rubber lodged in a plug electrode. Think the grey fuel lines must be going bad. Ski is up and running again but better change the lines. Will any old fuel line do or is it special stuff?

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by aj1987 View Post
    ...found a small piece of rubber lodged in a plug electrode.

    Think the grey fuel lines must be going bad.

    Ski is up and running again but better change the lines. Will any old fuel line do or is it special stuff?
    Absolutely change those fuel lines, especially if they are the original Tempo gray hoses.

    Rubber bits from a fuel line would have to get through the carb filters and jets. That doesn't seem likely.

    Pull the carbs and rebuild them, just to be sure they are good.

    Is he really sure it was rubber stuck in the plug gap?

    Have you run it in the water since, or just on the trailer?

    I am wondering if something else is coming apart in the engine, and shedding pieces.

    If you can, pull the intake reeds and check for damaged petals.

    Just how good was compression? What were the numbers?

  9. #9
    yeah he was certain there was rubber stuck in the gap. Checked the reed valves and they were fine. Compression is 155 ish on both cyls. Had it out on the water last weekend and it was going great. Trouble is went to use it the other day and guess what, no spark AGAIN. Phoned the company I got it off and it defo had an ignition upgrade in 2004. Does it sound like the LR module?

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by aj1987 View Post
    ...it defo had an ignition upgrade in 2004.

    Does it sound like the LR module?
    Hold down the bilge pump button. Bilge pump should run continuously while button is held down.

    If the engine starts and runs with the bilge pump button held down, and doesn't start/run when you release the bilge button, then the LR module would be suspect.

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