670 super spark plugs

tleake

Member
My dad just bought a 670 super gas. Was wondering what plugs to run in it. It has 10A-4210 heads, same as his 670LP. Are those high compression heads? Strange for them to be on a gas engine tractor?
Thanks
Tracy
 
Later tractors saw them used on numerous gas engines. Higher compression yielded higher horsepower without altering bore and stroke. Used on tractors destined for high altitude also. (To compensate for thinner air) .
 

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