Spark Plugs

[Jerry Grant]

I just got some spark plugs from NAPA for my 46 Z. The book says the correct spark plug for my tractor is a Champion J8. NAPA has J8C plugs and says they should be fine. I matched them up to my old J8 plugs. The porcelain portion of the J8C is a little longer that the old J8. Are these ok? Is the J8 still available somewhere?
Thanks for your assistance.

 

[Anonymous-0]

The C in J8C stands for copper core suppose to be a better plug but otherwise the same. Champion would have been my last choice as not the quality they use to be since now foreign made just throw away plugs once they foul. AC 45 or Autolite 295 or Denso W14-U would work well also.

 

[Clint Youse MO]

They will work fine they are a lawnmower plug though I use the Autolite 303 just a little hotter than the 295 if a plug will screw in and fire it will work may not be the best but will work

 

[Alan K]

Ive used Autolite and Motorcraft. They seem to work good. Some of the Champions Ive used worked ok and some didnt.