How Do You Test A Coil Or Spark Plug On Lawnmower Engine?

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There are three main ingredients to starting and operating a lawn mower: air, fuel and spark. While checking for a clogged air filter or filling the fuel tank requires little thought, determining if the ignition coil is creating the electrical spark needed to burn the air and fuel can be puzzling. Fortunately, the task is made easier by the relative simplicity of most lawn mowers' small engines. With a few basic items you can quickly determine the health of your mower's ignition system. Open the lawn mower's hood or cover to access the ignition coil. Locate the ignition coil on the motor by following the spark plug cable to the coil. Pull the spark plug cable off of the spark plug and remove the spark plug. Set it aside for now. Disconnect the ignition coil's kill switch wire by pulling the wire directly off of the coil. Insert a spark tester tool or a replacement working spark plug into the spark plug wire. Ground the spark tester or spark plug by placing it directly against the ... more
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