Disconnect kill lead to ign sw,crank eng & check for spark,if you have spark now then problem in wiring to ign sw from coil,ign sw bad or problem in safety sw's or wiring harness on tractor.
If still no spark with kill lead disconnected,check that connection from megafire module to eng block/chassis is clean/tight.After that check flywheel/coil air gap,manual says .010"-.014" or check instructions for megafire unit,air gap may have to be changed,after that goto link below & read instructions for setting flywheel timing as same is adjustable on 243000 series eng.
If after disconnecting kill lead,checking megafire ground connection & flywheel timing & you still have no spark,remove coil & take to one/more local mower shops & have them check in a coil tester,if coil tests ok,then problem may be one of the following:
1-Megafire unit bad due to heat/vibration depending on where same mounted on eng/tractor.
2-Flywheel magnets weak,this is a somewhat common problem on these old briggs eng,might try changeing flywheel/coil air gap if magnets the problem,you might be able to get around weak magnets this way.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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