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no sparks on a new F15CMH

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  • no sparks on a new F15CMH

    thank you for your time, no way to start anymore a new ( 10 hours ...) Y 15hp 4S , no sparks on the plugs , engine is far away from a dealer (700 km) (north palawan), in such a case is it always the ignition coils ? anyway to test it ? to change it is very expensive (120 $) and am not even sure it is the problem , pls help thank you very much

  • #2
    spark plugs are new

    of course we tried with new spark plugs !

    thank you for your help

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    • #3
      Test CDI output voltage going to coil with a peak reading voltmeter to see if getting 115 peak volts. Chech secondary coil resistance is 4.91K ohms and primary is 0.16-0.24 ohms on each ignition coil.
      Regards
      Boats.net
      Yamaha Outboard Parts

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      • #4
        The safety lanyard is installed??
        Stanley Islander 19, 2006 Yamaha F150TLRC. Ottawa, Canada
        16' York River, 1986 Yamaha PRO 50.

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        • #5
          ok thank you , will try to figure out how to do that .

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          • #6
            yes , thank you

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            • #7
              Originally posted by boats.net View Post
              Test CDI output voltage going to coil with a peak reading voltmeter to see if getting 115 peak volts. Chech secondary coil resistance is 4.91K ohms and primary is 0.16-0.24 ohms on each ignition coil.
              sorry am an ignorant and
              sorry for my english I am french !

              pls more of your time, according to the 1234 on the joined pic how do I proceed for the coil resistance measures ?
              is it 0.16-0.24 ohms btw 1 and 2 and 4.91K ohms btw 1 or 2 (well the positive...) and 3 or 4 ?
              am not on the spot now. will have it check after you answered thanks again
              of course for the CDI output I am not equipped with a peak reading voltmeter or a DVA adapter, i think if I was, I wont ask all those questions ... !
              Attached Files
              Last edited by boayan123; 06-23-2012, 10:09 AM. Reason: more accurate

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              • #8
                unplug the white wire at the CDI and retest for spark.

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                • #9
                  sadly no change

                  Originally posted by rodbolt17 View Post
                  unplug the white wire at the CDI and retest for spark.
                  thank you very much for your help
                  yes to remove the security wire is a good idea but sadly no change no sparks

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                  • #10
                    .16-.24 between orange and black wires
                    4.91 between spark plug wires with plug cap removed.
                    But need to check peak reading volts first.
                    Regards
                    Boats.net
                    Yamaha Outboard Parts

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