spark plug

[bobs old iron]

what type of spark plug would you use in a j-d B and what size is the plug wrench i need to fit

 

[greenmech]

Depends on what year B. There are two sizes depending on the year. Ron MN

 

[John T]

If the later model 18mm I like Autolite 3116 NON Resistor ESPECIALLY if a magneto ignition.. If the older typically Unstyled 7/8 Plugs I like the deep reach side wire electrode Autolite 3077. Think those are right Id have to check NO Warranty

John T

 

[bobs old iron]

thanks for reply found some 3116 put them in starts good but carb needs rebuilding

 

[buickanddeere]

Coolant temp has to be kept between 195F -210F doe
Any plug to operate without excessive fouling .