Thread: 40 jet no fire

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  1. #1
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    40 jet no fire

    i have a 2001 40 merc jet carb motor started and ran fine in tank took to lake to check for coilpak breaking down but i got to lake no start.. i chaecked kill switch and fuse still no start and no fire where to start to fond problem??????

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    #2
    If kill switch has been checked the next thing i would do is unplug the rev limiter that is mounted on the electrical panel on the stb side of the engine. ( has the black with yellow stripe coming from it that can be unplugged). Good luck



    IF ITS BLACK ITS ON THE BACK!!!

  3. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #3

    Re: (Mercmonster)

    +1....

    Also, verify that you do, or DO NOT have spark on all plug wires.

    If NO spark is present.... isolate rev limiter as above mentioned, and see if spark returns (don't forget to reconnect the rev limiter).

    Other possible causes include:

    -Shorted kill circuit in harness, ignition switch, or lanyard switch
    -Failed CDM (#1 would be most likely)
    -Faulty GROUND for CDM's, or to the electrical plate
    -Failed Stator
    -Failed Voltage Regulator (unplug- if spark returns, it's the culprit)




    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

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    #4

    Re: (Mercmonster)

    thanks

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    #5

    Re: (EuropeanAM)

    thanks

  6. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #6

    Re: (ldtr21ky)

    You're welcome (welcome).

    Be sure to report back with what you find.




    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

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    #7

    Re: (EuropeanAM)

    still no fire

  8. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #8

    Re: (ldtr21ky)

    Please read this VERY carefully.

    1) Unplug #2 CDM (coil) harness plug. Recheck for spark on 1-3. If spark returns, REPLACE #2 CDM. If not, proceed to: 2).

    2) Reconnect #2 CDM. Unplug #3 CDM. Recheck for spark on 1-2. If spark returns, REPLACE #3 CDM. If not, proceed to: 3).

    3) Reconnect #3 CDM. Remove #2 CDM completely, and plug it into the connector for #1 CDM. Recheck for spark on 1-3. If Spark Returns, replace the Original #1 CDM (the one you disconnected). If not, proceed to: 4).

    4) Disconnect wiring harness plug for ignition switch harness (cannon plug) connector. Jumper the starter solenoid while checking for spark (all CDM's must be connected). If spark returns- the problem is in the keyswitch, killswitch, or keyswitch wiring harness. If not, proceed to: 5).

    5) Reconnect all plug harness connectors. DISCONNECT VOLTAGE REGULATOR. Recheck for spark. If spark returns- REPLACE voltage regulator.

    If you're unable to determine the problem with the above steps, I'd strongly suggest enlisting the hands-on expertise of a Certified or Master Technician.




    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

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    #9

    Re: (EuropeanAM)

    still no go taking it to shop tomorrow thanks

  10. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #10

    Re: (ldtr21ky)

    Probably a good idea.... might be a good idea to have them start by checking the Stator Output.




    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

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    #11

    Re: (EuropeanAM)

    thanks

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    #12

    Re: (ldtr21ky)

    PLEASE DELETE

  13. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #13

    Re: (ldtr21ky)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by ldtr21ky &raquo;</td></tr><tr><td class="quote">PLEASE DELETE</td></tr></table>

    This would be up to Sherm. Normally, we don't delete posts, as they may be useful to someone else searching for a solution to a similar problem in the future.

    Could you possibly update on what the cause was determined to be?




    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

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    #14

    Re: (EuropeanAM)

    oh ok no problem all 3 cdm modules bad apparently one was bad and screwed others up replaced one at a time as we did fire returned to all cylinders now time to hit the river smallie time.

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