plugs.

[Farmallken.]

Hi Guys.
What spark plugs do you guys use in your farmall H tractors. Thanks again for all the help.
Ken.

 

[Dave_Id]

For not so good engines, I use Autolite 1186 or Champion D21. They are a little hotter plug. Normal engines, Autolite 386, the Champion equivalent to that would be D15, or D18 would be slightly hotter

 

[Steven f/AZ]

Depends on how hard you're going to use it.

I'm running Champion D18 or D19 I think and have no troubles because I work mine pretty hard.

D21 are hotter plugs that are good for idling around the yard or just cruising around...

 

[Andy Motteberg]

I use Autolite 3116 plugs. They are non-resistor plugs and work much much better than any other plugs I've ever used.

 

[rustyfarmall]

Autolite 388s are equivalent to Champion D-21s.

 

[buickanddeere]

Nope, 388's are resistor and the D-21 are none resistor. 378 and D-21 are similar
Unless you are using a Ham Radio on that tractor, listening to AM radio or takeoff & land at busy airports. Use none resistor plugs and solid core wires.

 

[RayP(MI)]

Buickanddeere - QRZ? de WB8VWK .... and yes, our's get ham radio from time to time! (Wonder why they're all converted to 12v?)