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Instructions for a Powerbuilt 648421 14mm spark plug thread repair kit?

Question:

I purchased the Powerbuilt #648421 14mm spark plug thread repair kit but there were no instructions included. I know how to use the kit but I need to know what size hole to drill for the thread insert?

Answer:

Hello Tom,
This unit is quite simple. Once you realize the need to use a rethreading tool, use the tool to rethread the hole and then, dependant on the length of threads on your spark plug, use that length insert and hand thread the insert into the spark plug hole and replace the spark plug. You do not need to do any further drilling.

Thanks for asking,

Carl



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