Review on ⚡ Dorman 86579 Electrical Tester - Inline Spark Plug Diagnosis Tool by Johnny Murphy
There really is an extra bulb!
My old one just needed a new bulb but it's hard to find a replacement and costs more than the whole unit. For small motors, it is a little flimsy and sometimes difficult to install on small motors with a short cable. You have to use it in a dark place in the store to see how it works.
- practical item
- very expensive
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