Spark plug heat range

  • Thread starter Thread starter Anonymous
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Anonymous

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I just pulled two sets of Autolite spark plugs out of a storage container, and can't remember how to tell the heat range. Which is hotter- 45 or 46?

Sedanman
 
I believe the 46 is hotter. Check this out...

http://www.autolite.com/tech/SparkPlugN ... System.pdf


Recently I bought a set of plugs and put them in. The insulator was not rolled tight in one of the plugs and it blew out of the holder while I was two blocks from home. Made a bad and nasty sound. I replaced them with Bosch platinums and now I couldnt be happier. Prolly helped that I tuned the carb some too! :roll:
 
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