The 3923 is one heat range colder and has a "normal" tip. The 5224 has
a "power extended tip" which extends farther into the combustion
chamber. 5224 is the stock replacement. 3923 works better in the
3.9/5.2/5.9
Michael Stepka wrote:
>
> What is the difference between the Autolite 3923's and the autolite's that
> are recommended 5224's? When I looked at the Autolite book it list 5224
> for the spark plug. What exactly is different about it? Thanks.
>
> Mike
-- -andy http://home.twcny.rr.com/andylevy/ --- andylevy@bigfoot.com ---------------------------------------------------------------- Remember, amateurs built the ark. Professionals built the Titanic. ----------------------------------------------------------------
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