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Old 05-12-2002, 02:01 PM
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Post Weird spark plug situation??

I have a Briggs and Straton 3 hp lawnwower. Today it would not start. I pulled the spark plug wire about 1/4 inch away from the end of the spark plug, plulled the starter cord, and the spark jumped the gap, and the engine started up and ran like a new one. Can anyone tell me what is going on with this?? When I re-connected the wire to the sparkplug, the engine died??

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Old 05-12-2002, 02:43 PM
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I know it dosen"t make any sense, but have you tried a new plug?
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Old 05-12-2002, 07:36 PM
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I took that same spark plug out, cleaned it with a wire brush and some sand paper, put it back in and the mower started up and ran like a new mower. Still don't understand it.
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Old 05-13-2002, 05:02 AM
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Hi Jim. When you pull the wire it creates a strong spark to jump the gap whick will creat a srtonger spark. This is how we used to start Fords in the middle of winter. Yhe salses dept would flood the motors with extreme regularity a us good folks in service would have to start them. -25 deg or colder. We would pull the coil wire as you did with the spark plug wire, crank the motor and it would fire right up. You probaly have a bad spark plug or its flooded.
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Old 05-13-2002, 07:32 PM
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Steve,

Thanks so much for that information. I had no idea what was going on there, so its nice to have someone explain it. That spark plug only had a thin film of black soot on it but I guess that was enough to keep it from firing.
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