Does not get a zero because it fires the connected spark plug. I don't know anyone who would work in complete darkness without a breakdown. Fixed lawn mower outside in daylight. Even in the shadows, no light is visible. In addition, ***DANGER*** When the shoe is plugged into an AC outlet, it will have approximately 1.5 inches of bare metal. For those not into bare metal, this is synonymous with high voltage.
π§ Effortless Spark Plug Boot Removal Tool for Mercedes Benz V6 V8 - EWK 17mm Wrench
9 Review
π§ Enhance Performance with the Boost Monkey Spark Plug Gap Tool (12mm & 14mm) + Feeler Gauge
9 Review
π ABN Inline Spark Plug Tester β Straight Boot Ignition Test Light for Small Engine Vehicles: Cars, Motorcycles, Lawn Mowers, Chainsaws
9 Review
Sunex 884504: High-Quality 3/8-Inch Drive Thin Wall Spark Plug Socket - Metric CR-MO Construction
9 Review