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Coil Tester Indicator
The light indicator shows the color of the spark very clearly so you can identify problem. This is a practical diagnostic tool for any engine with spark plugs.
Easy to Use
Simply connect the spark plug tester for small engines between the spark plug and the plug wire, and if a spark is being sent, the tester will mirror the spark and light up.
Spark Plug Tester
Great for troubleshooting any internal combustion engine, armature diagnostic detector can quickly and easily diagnose ignition/engine outboard motor issues or a fault in the fuel.
Notice
If you test under bright lighting conditions and don't get the correct results or can't see well, try again in a less bright environment.
Specification
Material: Rubber + Metal
Color: Black
Weight: 4.41 Ounces
Package Included: 2 x Spark Plug Testers
When you have connected the spark plug tester and started the engine, you can let the engine go on for a while and allow the spark plug tester to work better.
Bubbarosa
2025-08-21 13:22:09
They work, so far. Nice test equipment for my mower
gary schall
2025-08-12 10:29:00
Can use them on 2 cylinder tractor engine and observe both at the same time to diagnose any spark or non spark issues. Extremely helpful tool. Good price.
Maynard
2025-06-21 14:51:03
Easy to put in line and check spark. After quick install and starting the engine, easy to see ignition firing.
Travis A
2025-05-10 18:39:57
These worked good. I wish they were brighter, but the spark time is very short normally. They did work exactly like they said.
Walter H.
2025-05-03 15:56:47
works great
Donald Schofield
2025-04-30 10:28:44
The light is very difficult to see in normal lighting and the cables are very easy to damage. Handle with care!
SandMan
2025-04-04 21:50:45
life saver for trouble shooting my lawn mower and car
Charles Cain
2025-02-06 15:40:45
I have used this twice now on a mower and a generator. It was difficult but not impossible to use on the Harbor Freight generator as the spark plug wire was very short but I managed. I like the neon light ( I think it's neon) as it is easier to see in day light then a spark gap type of tester. Although it isn't possible to tell how strong the spark is.
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