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    Strohs's Avatar
    Strohs Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Sep 7, 2013, 03:45 AM
    Lawn mower manuals
    I have a 20hp twin cyl. B&S engine,I was getting no spark so I bought a new MAGNETO . I had spark but still weak.I put a card between for gapbut still weak spark Help!!
    cdad's Avatar
    cdad Posts: 12,700, Reputation: 1438
    Internet Research Expert
    		  
    #2

    Sep 7, 2013, 07:36 AM
    Have you tried contacting the manufaturer of the machine and asking about a repair manual ?
    smearcase's Avatar
    smearcase Posts: 2,392, Reputation: 316
    Ultra Member
    		  
    #3

    Sep 7, 2013, 09:00 AM
    This B & S link may help:
    Spark Plug Gap | Briggs & Stratton

    You need to have the right gap first in order to do any proper troubleshooting. The card you used could be way under or over the design gap. Good luck.
    crigby's Avatar
    crigby Posts: 4,343, Reputation: 107
    Outdoor Power Equipment Expert
    		  
    #4

    Sep 8, 2013, 06:13 AM
    Hi,
    You may also want to disconnect the ground wire to the armature to make sure something else on the machine is not affecting the situation.
    Peace,
    Clarke
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