Portable Spark Plug Gauge that is also a Gapper
If you are planning to regap your spark plugs, rather than replace them or have a mechanic gap them, you'll need a good spark plug gauge in order to do the job well. There are many different sizes and types of gauges that you can buy, but one solid one is theLisle Spark Plug Gauge, model #67870.The Lisle gauge is a circular piece of dull gray metal, roughly the size of a half dollar. It doesn't open, fold, or move, so there's nothing to break, and the gauge is simple to use. The outer edge of the gauge slowly increases in thickness as it goes around, and each gap size is ticked off with a well-distinguished mark. The gauge measures spark plug gaps from 0.020 inches up to 0.100 inches, and it's easy to read. On the back of the gauge, you'll even find metric gap measurements, from 0.5 millimeters up to 2.55 millimeters. (The product description says it goes up to 2.53mm, but the markings on the gauge appear to end at 2.55mm.)The gauge is accurate on the spark plug it was tested on. The edges are smooth and easy to use for measurement. In addition to being a spark plug gauge, this tool can also be used as a spark plug gapper - the hole cut into the gauge can be used to pull up on the side electrode, without damaging (or even touching) the center electrode, if used correctly.The Lisle Spark Plug Gauge is a good, well-made, tool, made in the United States. It's small enough to fit in your pocket or into any toolbag, and it's very lightweight. The gapper hole allows the gauge to fit onto a keyring if you want to carry it that way. It can be purchased online from Amazon.com for $4.79, and it's eligible for free shipping on orders that are $25 or more.Two comparable gauges are theK-Tool International Spark Plug Gap Gauge(model #KTI73701) which costs $0.99 but only goes up to 0.090 inches and doesn't appear to have metric measurements on the other side, and theIgnition Products Spark Plug Gap Gauge(model #990087) which has similar markings to the Lisle gauge but costs $5.99. The K-Tool gauge is not eligible for Amazon's free shipping offer, but the Ignition Products gauge is eligible.
