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Old 03-10-2021, 09:54 PM   #18
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Join Date: Aug 2011
Location: Illinois
Posts: 730
Default Re: New spark plug numbers

A few years have passed since I started this thread. Some new info out there is that some of the new 3X repos are not as well constructed as the originals. I have had some new 3X ‘s fail with the internal contact breaking internally. The plug looks to be perfect but miss fires...... Often intermittently making you scratch your head on what is happening to your engine to cause the lack of power and a miss. Good idea to carry a spare spark plug on a tour because of this.

Also a lot of us are now running the A’s with higher compression heads that like the spark gap to be reduced down closer to 0.030 for best performance.
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