This is the best method to determine if your ignition system is capable of producing a good spark. It's better than the testers that utilize a light for this purpose. The only negative is that the adjustment screw does not have a friction hold to prevent it from inadvertantly moving. I had to modify it by installing a butterfly nut to lock it in place. A design flaw.
Verified purchase: Yes | Condition: New
Well made, good price, and easy to use.
Verified purchase: Yes | Condition: New
I own other Lisle products and this is typical of their good quality.
Verified purchase: Yes | Condition: New
Good product
Verified purchase: Yes | Condition: New
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