Agreeing with others who have commented, I'm just a guy looking to replace a spark plug on my own lawn mower/snowblower. This was the cheapest, yet most relevant gadget I could find online, and that's why I bought it. I personally have no qualifications to remark at how accurate the gauge is. All I can say is that I used it to set the gap according to the Honda small engine manual I was referencing, and it fired right up. Seems like a pretty affordable solution to have hiding in a bench drawer somewhere for the 1-2x I might need it every other year.
Rating:
[5 of 5 Stars!]