Super M Spark Plugs

Gonna replace the sparkplugs on my super m. What are the best to
use. I have autolite 3116 in my H (i think) is it the same or are there better
ones out there? Thanks as always
 
The 3116s are what Autolite recomends for the "Letter" serries tractors and 386s for the 6 cylinders (560, 706, etc) with today's gasoline..

I use to run all Champions until 5-6 years ago when I switched to Autolites. Don't have near the problem with fouling that I use to have.
 

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