John Deere BW Spark Plug

What year is it? Older ones take a different plug than newer ones, Pressed steel frame
or cast frame?
For the older with 7/8 plugs I like the hotter deep reach side wire electrode
Autolite 3077.. For the later with 18 mm plugs I like NON Resistor Autolite 3116
especially with magneto ignitions or Autolite 388 (tad hotter than 386) if you go
with a resistor plug on battery powered coil distributor systems.

John T
use the correct long reach plugs. brand dont matter. if u use a plug like the d16 champion its too short, need d23 as for example.

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