

⚡ Diagnose ignition issues in a flash—don’t get left in the dark!
The Lisle 20610 Inline Spark Tester is a compact, dual-ended tool designed for quick and accurate visual checks of ignition systems. It connects inline between the spark plug and wire, flashing a mirror image of the spark while the engine runs, enabling fast diagnostics without removing plugs. Trusted by professionals and DIYers alike, it’s a must-have for efficient engine troubleshooting.




| ASIN | B0002STSC6 |
| Best Sellers Rank | #2,820 in Automotive ( See Top 100 in Automotive ) #11 in Spark Plug & Ignition Tools |
| Brand Name | Lisle |
| Color | Red |
| Customer Reviews | 4.7 4.7 out of 5 stars (6,771) |
| Global Trade Identification Number | 00083045206101 |
| Included Components | Spark Tester |
| Item Dimensions | 10.5 x 5.75 x 1 inches |
| Item Type Name | Spark Tester |
| Item Weight | 0.27 Pounds |
| Manufacturer | LISLE |
| Measurement Type | Ohmmeter |
| Model | 20610 |
| Style Name | Inline Spark Tester |
| UPC | 083045206101 |
| Unit Count | 1.0 Count |
| Warranty Description | 30 Days |
S**R
Why did I wait so long to buy one of these?
This device saves so much time trying to determine if a small engine has spark. It is so much easier than pulling the spark plug and trying to prop it up against the case of the engine to see if it has spark. Just hook this up inline to the spark plug, crank the engine, and get immediate feedback that spark is present. This is great.
B**S
Easy way to check engine spark
I find this device really helpful when I need to quickly see if my small engine has spark. It’s much easier than removing the spark plug and trying to hold it against the engine case. Connecting it inline to the spark plug and cranking the engine gives me instant confirmation if there’s spark or not. It’s a simple improvement that saves me time and hassle.
A**D
Shocking less
Works great.. saves me from getting shocked
R**N
Good tool
Handy device that takes guess work out of sparking issues for engines.It is made in the usa.
B**R
Very well made worth the money
Very good product I can see that the quality exceeds what I can buy in the stores locally
A**O
Handy tool for checking engine spark
Deciding whether a small engine has spark is much quicker with this device. It's a lot simpler than removing the spark plug and trying to position it against the engine case. Just connect this inline to the spark plug, start the engine, and you quickly see if there's spark. It makes testing much easier and faster.
D**.
Works good I’m pleased
Works as it should
J**L
Great quality.
Great product and much better than the orange product that is similar to this one that is sold on Amazon. Well worth the money. Great quality.
R**N
Perfect for the job saves time
R**B
GOOD PRODUCT
K**N
Muy útil. Pará identificar fallos en cables y bujías. Y saber si hay chispa.
J**N
Great product and long plug to go down in the cylinder to connect to the spark plug and great to put onto the coils, long enough to see from cyclinder 1 and 8
D**S
Great for small or big engines and works great in the sunlight. Nice and bright bulb
Trustpilot
2 weeks ago
1 month ago