Late A spark plugs

pbb

Member
Which Autolite spark plug goes in a Late A with a Mag? Mine has 386 in it now . They have 386 388 and 3116 but don't know which is for a mag and which is for a distributor.
 
Since its a Magneto Ignition, I would use a NON Resistor Plug the 3116. 386 and 388 are Resistor plugs.

John T
 
The 388 are hotter than what you have now and they are what I run even with mags. for years without problems. For years I also never knew they were a resistor type plug. But I did check one and they are.
 

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