Champion; standard heat range 8 Com.; Hot C-7; cold 6M.
AC; Standard heat range 86 Com; Hot 87Com.; Cold 85 Com.
These are part numbers from the early 1950's and I suspect have been superseded several times over the years.
Below is a site that converts old numbers to current part numbers:
Champion 8 - alternative spark plugs
www.sparkplug-crossreference.com
Champion 6M - alternative spark plugs
www.sparkplug-crossreference.com
Champion 7 - alternative spark plugs
www.sparkplug-crossreference.com
Gap is 0.025" Thread is 18mm
Thank you very much..I dug out my Ferguson TO-30 Owner's Manual, turned to page 30, Spark Plugs. Two brands are listed with three heat ranges:
Champion; standard heat range 8 Com.; Hot C-7; cold 6M.
AC; Standard heat range 86 Com; Hot 87Com.; Cold 85 Com.
These are part numbers from the early 1950's and I suspect have been superseded several times over the years.
Below is a site that converts old numbers to current part numbers:
Champion 8 - alternative spark plugs
Champion 6M - alternative spark plugs
Champion 7 - alternative spark plugs
Gap is 0.025" Thread is 18mm
Tom Bowman
Member
NGK AB-6 (2910) or Autolite 3116.
I have used both in my TO-20, and both work fine.
Mad Farmer
Well-known Member
- Location
- Northeast
Is there a difference from the Autolite 386? Found it 386 is a resistor plug
Not need resistor plug in a tractor. regulars might give a bit hotter spark. I think resistor plugs were mainly for cars, greatly reduced noise in the radios. per my experience in that field.
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