Mower would not start so started diagnostics. Removed and cleaned carb. Getting fuel. Spark plugs are new but are not firing. Checked coil/magneto. Would not pass ohms test. Ordered new coil on Enay and received it, it would not pass ohms test nor fire the plugs. Contacted seller and they promptly shipped me another coil without any associated seller flak. Received the second coil and it will not pass the ohms test nor fire the spark plugs. Contacted the seller again and they are sending me a return label. The seller AMC has been great to work with but I still have a non running lawn mower. The coil should ohm out by positive lead to plug wire end and negative lead to laminated metal on coil set at 20k with a reading somewhere around 8000 but I get nothing using two different meters, one of which is brand new. The coil will fire if you ground the lead to a head bolt. I cleaned all grounds and even grounded the engine to the frame. Still nothing. I am at a loss, any ideas ?