Touch your Postive lead to each of the terminals on the Ignition Coil a Good Coil should read close to 9k Ohms, If your coil has more then 12-14K Ohms resistance then this is likely it needs replacing. As the greater the resistance of the coil the weaker the spark.
There Is some variation in Victa Ignition Coils, Some include fixed wires and an Ignition module these coils Read around 13Kohms New.
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