The post How to Test a Spark Plug to See If It’s Working appeared first on Family Handyman.

Luckily, that’s the kind of lesson you only need to learn once and, thankfully, it’s not the only way to test a spark plug. Like all other things mechanical, spark plugs will see their day.

Manufacturers have been doing their best to give gas-powered lawnmowers a run for their money with increasingly powerful and ...