Using this to test the coil on my vehicle. I get intermittent small reddish flash. Not sure how to interpret this? Is any light a positive sign?

Use the tester in a dim lighting area and when you see the reddish-orange flash, that shows a bad spark. A healthy spark will be more intense with a blueish-white spark. I used this tester on my riding mower on June 1, 2015 and replaced the ignition module (same as a vehicle coil). The tester showed the difference before and after!

Can this be used for my 115 outboard motor?

Yes Ihave used it Mine and Ihave Used it on Lawnmovers

How do you use this with a lawnmower that doesn't start? Hooking it up is simple, but then what? Pull the recoil starter rope & look at the light?

Yes, if it starts the light will flash everytime the sparkplug sparks. If it does not start the light will flash everytime the sparkplug gets power and then you know it is not an electrical problem. It can then be either a bad sparkplug or a fuel problem. If it does not flash when you pull the rope then it is an electrical malfunction (ie. magneto, points, or electronic ignition problem). Always test your light to make sure it works on something else that runs.

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Lisle 20610 Inline Spark Tester, One Size, Factory

Lisle 20610 Inline Spark Tester, One Size, Factory

Product ID: 254740982

Details

Brand
Lisle
Colour
Red
Item weight
122 g
Power source
Hand Powered
Style
Inline Spark

⚡Visual spark check

🔄Dual-ended design

⏱️Instant ignition diagnosis

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1061756₫

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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Diagnose like a pro, spark your engine’s true potential!

TRUSTED CERTIFIED - Patented tech with CE, RoHS, and UL certifications for reliable performance.
COMPACT LIGHTWEIGHT - Portable 122g design fits easily in any professional toolkit.
DUAL ENDED VERSATILITY - Straight and 90° boots in one tool for all spark plug setups.
INSTANT IGNITION INSIGHT - Quickly diagnose ignition issues without guesswork.
VISUAL SPARK CONFIRMATION - See a mirror image of the ignition spark live with engine running.

The Lisle 20610 Inline Spark Tester is a patented, dual-ended ignition diagnostic tool that provides a clear visual check of spark plug performance. Lightweight and compact, it fits seamlessly between spark plug and wire, flashing a mirror image of the ignition spark in real-time. Certified to CE, RoHS, and UL standards, it’s a must-have for professionals seeking fast, reliable ignition troubleshooting.

Specifications

ASIN	B0002STSC6
ASIN	B0002STSC6
Best Sellers Rank	#62,772 in Automotive ( See Top 100 in Automotive ) #69 in Automotive Spark Plug & Ignition Tools
Brand Name	Lisle
Color	Red
Compatible Devices	Vehicles with internal combustion engines
Customer Reviews	4.7 4.7 out of 5 stars (5,963)
Customer reviews	4.7 4.7 out of 5 stars (5,963)
Date First Available	1 January 2024
Department	unisex-adult
Global Trade Identification Number	00083045206101
Included Components	Spark Tester
Is Discontinued By Manufacturer	No
Item Dimensions	26.7 x 14.6 x 2.5 centimeters
Item Type Name	Spark Tester
Item Weight	122 g
Item model number	20610
Manufacturer	Lisle
Manufacturer	Lisle
Measurement Type	Ohmmeter
Model	20610
Part Interchange Info	20610
Part Number	20610
Power Source	Hand Powered
Product Dimensions	26.67 x 14.61 x 2.54 cm; 122.47 g
Specification Met	CE, EN 61010-1, RoHS, UL
Style Name	Inline Spark Tester
UPC	083045206101
Unit Count	1.0 Count

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