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Allis Chalmers Discussion Forum

1966 Allis Chalmers Big Ten Spark Plug

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Donald Cramer

06-09-2014 12:53:00

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Can anyone tell me what the correct spark plug is for a 1966 allis chalmers big ten.

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Aaron SEIA

06-11-2014 14:14:34

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 Re: 1966 Allis Chalmers Big Ten Spark Plug in reply to Donald Cramer, 06-09-2014 12:53:00  
Book says Champion CJ8 is stock. Gap is .03". Not sure what one would consider low engine RPM. They were set at 3,600 rpm.


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2 stroke

06-10-2014 19:49:45

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 Re: 1966 Allis Chalmers Big Ten Spark Plug in reply to Donald Cramer, 06-09-2014 12:53:00  
Hey buddy Try a J8C champion I have been fooling around with these old Briggs engines a lot over the years. If I ain't badly mistaking that is the right plug for it. I think lower your number the hotter the plug, and those old engines don't have a lot of RPM's, so they need some heat to keep them from fouling up.

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06-09-2014 19:24:23

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 Re: 1966 Allis Chalmers Big Ten Spark Plug in reply to Donald Cramer, 06-09-2014 12:53:00  
If I remember right it is a Champion J19LM

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