Adjustable spark gap to determine strength of coil on most small engine applications.
Designed for use on small engines with and without batteries; third pin is for magneto systems on small engines.
Highlighted marks at 4 & 6mm for most common start and end locations.
Spark plug end fits securely onto spark plug for better connection than alligator clip.
Got to www.thexton.com or contact your local representative for purchasing.
Post time: 07-17-2017