Aug 17, 2013 / M spark plug gap #1 JasG Veteran Member Joined Jan 10, 2004 Messages 1,047 Location CNY Tractor B2650, What is the correct plug gap for a late 1940's Farmall M?
Aug 17, 2013 / M spark plug gap #2 M MIKE R Elite Member Joined Sep 14, 2010 Messages 4,030 Location CANADA Tractor Many 0.025inches.
Aug 18, 2013 / M spark plug gap Thread Starter #3 OP JasG Veteran Member Joined Jan 10, 2004 Messages 1,047 Location CNY Tractor B2650, Thanks for the reply. What plug do you recommend? It has champion D21's, yet I see on other old tractor forums, they have other plugs listed. From Autolite 3116, 386 or Champion D16.
Thanks for the reply. What plug do you recommend? It has champion D21's, yet I see on other old tractor forums, they have other plugs listed. From Autolite 3116, 386 or Champion D16.
