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    shirleyb1968's Avatar
    shirleyb1968 Posts: 13, Reputation: 1
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    #1

    May 17, 2010, 11:30 AM
    I have 18 hp briggs and staton craftsman tactor will crank but won't stat there is no
    The tractor cranks but it does not spark put a brand new coil pack on and it didn't help I have it sitting in my work bench.I hooked up a battery starter to it to see if it had spark but it doesn't all it does is crank.the coil tested good.last time it ran my kids blew the mwer deck off and ever sice then it won't start.it did blow the fuse though after that.and there was smoke that came out behind the flywheel and suggestions
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
     
    #2

    May 17, 2010, 11:34 AM

    Pull the plug, reattach the spark plug wire, ground the plug to the engine. Now turn your key does the engine turn over and do you see a spark at the plug tip. If so, what color is the spark
    shirleyb1968's Avatar
    shirleyb1968 Posts: 13, Reputation: 1
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    #3

    May 17, 2010, 11:46 AM

    I did that and there is no spark I already tried that my husbandhas the motor out of the tractor sitting on the work bench he used a battery starter to crank and thees nothing
    DG's Avatar
    DG Posts: 1,375, Reputation: 109
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    #4

    May 17, 2010, 07:55 PM

    Sounds like the diodes going to the coils are blown.
    shirleyb1968's Avatar
    shirleyb1968 Posts: 13, Reputation: 1
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    #5

    May 18, 2010, 12:47 PM

    Where are the diodes located
    DG's Avatar
    DG Posts: 1,375, Reputation: 109
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    #6

    May 18, 2010, 06:17 PM

    Under the engine blower housing they run to coil.
    jsfocke's Avatar
    jsfocke Posts: 310, Reputation: 37
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    #7

    May 19, 2010, 07:41 PM

    The kill wire on the coil could be grounding it out. If you unplug the small black wire from the coil does it spark then?
    shirleyb1968's Avatar
    shirleyb1968 Posts: 13, Reputation: 1
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    #8

    May 22, 2010, 10:07 AM

    The black wire isn't hooked up. Is it near the alternator under the flywheel the diode.
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    shirleyb1968 Posts: 13, Reputation: 1
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    #9

    May 23, 2010, 12:54 PM
    Quote Originally Posted by jsfocke View Post
    The kill wire on the coil could be grounding it out. If you unplug the small black wire from the coil does it spark then?
    Please help still no luck the black wire isn't hooked up
    jsfocke's Avatar
    jsfocke Posts: 310, Reputation: 37
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    #10

    May 23, 2010, 02:21 PM

    If the black wire is unhooked from the bottom of the coil the only other things that should cause it not to spark is a bad coil, a coil that is not gapped properly or too much rust on the coil or flywheel.
    shirleyb1968's Avatar
    shirleyb1968 Posts: 13, Reputation: 1
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    #11

    May 28, 2010, 08:53 AM

    Thecoil is new and we used a business card to gap the coil the flywheel we cleaned off
    jsfocke's Avatar
    jsfocke Posts: 310, Reputation: 37
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    #12

    May 28, 2010, 01:25 PM

    Well, you've got me...

    The contacts on the flywheel and the coil are the only thing besides the coil itself that produce the spark. The little wire that plugs onto the coil is what shuts it down to kill the engine. If it is not even plugged onto the coil it can't be effecting it. You are sure that you have the coil mounted correctly? It can be mounted upside down... I assume that you are unplugging your spark plug and using a screwdriver or a spark detector to make sure that you have spark.. A bad spark plug could make it seem like the coil isn't working. If you are using it and grounding the tip to see if you have spark I think I would remove the plug and use the ol screwdriver method to be sure. If none of this produces a spark then I would say you just got a bad coil. Even if you had sheared a flywheel pin or something more serious you would still get spark. It would just be at the wrong time.
    DG's Avatar
    DG Posts: 1,375, Reputation: 109
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    #13

    May 28, 2010, 06:33 PM

    Did you get it fixed .
    shirleyb1968's Avatar
    shirleyb1968 Posts: 13, Reputation: 1
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    #14

    May 31, 2010, 08:45 AM

    No it is not sparking what should the spark plugs be gapped at.I have them gapped at .30 is that right.
    DG's Avatar
    DG Posts: 1,375, Reputation: 109
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    #15

    May 31, 2010, 11:30 AM
    25 -30 is good
    Do you have all the wires unhook from the coil.if so and no spark has to be a bad coil,
    shirleyb1968's Avatar
    shirleyb1968 Posts: 13, Reputation: 1
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    #16

    May 31, 2010, 11:38 AM

    I am getting a very weak spark is that the coil it is a brand new one
    DG's Avatar
    DG Posts: 1,375, Reputation: 109
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    #17

    May 31, 2010, 11:41 AM

    Nothing pluged into the coil.
    DG's Avatar
    DG Posts: 1,375, Reputation: 109
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    #18

    Jun 5, 2010, 12:15 PM

    Make sure the wire is unpluged at the coil
    shirleyb1968's Avatar
    shirleyb1968 Posts: 13, Reputation: 1
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    #19

    Jun 13, 2010, 09:29 AM

    The coll pack was bad it is running now
    DG's Avatar
    DG Posts: 1,375, Reputation: 109
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    #20

    Jun 13, 2010, 10:19 AM

    Good Job.

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