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Old 08-06-2011, 07:18 PM
sexyvicta sexyvicta is offline
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from the horses mouth (briggs website):
ĽAn armature air gap that is too wide will prevent spark. Not true. Well, sort of not true. Briggs & Stratton air gaps cannot be made too wide to prevent spark providing the coil is healthy and the engine is spun over fast enough. A wide air gap, say .030" will ever so slightly retard the ignition timing as the magnetic field takes longer to build within the coil windings
so probably not the issue here.

i wonder did you set the cam timing correctly? maybe its a little out (i assume you had it apart when you were playing with the oil slinger etc)

Was it doing this when fitted to the mower? if so then could be valves need work/adjusting as mentioned earlier.