Review on Lisle 50850 Ignition Spark Tester by Eric Webb

Not worth the money. The screw in the steering rack does not remain after setting the correct play. The post also doesn't stay perpendicular to the base, so there's no guarantee you'll check the exact spacing you need. The clamp is located directly on the part. So if you don't have enough spark plug leads, it becomes difficult to find a near ground that isn't a battery terminal. Bought this to test the spark on my motorcycle. I was shocked a few times, it's an extremely simple tool, but it wasn't designed/designed to make any part of it easy to use/foolproof. From now on I'll test my spark the old fashioned way.