OTC 6589 Electronic Ignition Spark Tester

Good GO/NO GO tester, October 19, 2014
I was in a state of confusion because at bench, my coil was throwing a weak spark. This unit showed NO spark, however, and that diagnosis was spot on.

Five Stars, October 9, 2014
Very Happy

Five Stars, October 5, 2014
simply solution for testing spark.

Spark tester, September 27, 2014
This is a great spark tester. Only gave it 4 starts as the spring keeps popping out of the clip.

OTC means what, September 26, 2014
Ordered two, lost one already. Gets used a lot, hasn't broken.

Good to have for a quick test, September 23, 2014
It's ok. Spring keeps popping out from the clamp. Good to have for a quick test.

Five Stars, September 18, 2014
Tester works great.

Good but not great, September 13, 2014
This product operates very well, the one drawback is the clip is not very sturdy other than that it does what it is supposed to do.

Inexpensive and effective, September 11, 2014
Works as described. No more screwdriver spark checks.