Gunson presents its new spark plug tester

New from Gunson is this spark plug tester (part number 77176), a mains-powered diagnostic tool.

The tester replicates engine rpm and aims to enable easy visual assessment of spark plug condition and performance. The simulated rpm output is easily adjusted from 1000 to 6000rpm, testing the spark plug throughout this rev range; a plug may seem to be sparking adequately at cranking or idling speeds, but breaks down at higher rpm. Importantly, with dual testing ports, users can easily compare two spark plugs simultaneously, assisting diagnosis. A brand-new plug can be compared with an existing plug removed from the engine, for example.