will not start fitted new spark plug?

I have qualcast suffolk punch 35s electronic ignition No030876/k Last year it run perfectly and now it will n not start I have tried a new spark plug, i removed the spark
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I have qualcast suffolk punch 35s electronic ignitioNo030876/k Last year it run perfectly and now it will n not start I have tried a new spark plug, i removed the spark plug connected the HT lead and pull the the starter cord and thereis no spark could it be the electronic ignition is how much would be a new one thanks
plug connected the HT lead and pull the the starter cord and thereis no spark could it be the electronic ignition is how much would be a new one thanks

Ronald Barker
March 2009