Spark plugs and Magneto, do you need to use a certain plug?

Livin the Dream · Jul 4, 2011

Sorry pretty much posted my question in the subject box. But I was wondering if certain plugs work better with magneto starting tractors? Guess I never thought of it but if down the road someone started using different plugs than originally intended would that change how it starts or performs?

Thanks for your thoughts.

:?:

Tom Fleming · Jul 4, 2011

Nope, get the correct plug for the engine. It is much more important that the wires are copper. do NOT use resistor wire on a magneto. Copper stranded 7mm plug wire.

rustyfarmall · Jul 4, 2011

(quoted from post at 06:33:20 07/04/11) Sorry pretty much posted my question in the subject box. But I was wondering if certain plugs work better with magneto starting tractors? Guess I never thought of it but if down the road someone started using different plugs than originally intended would that change how it starts or performs?

Thanks for your thoughts.

:?:

The spark plugs need to be of the non-resistor variety, such as an Autolite 3116, and the wires need to be of the solid copper core variety.

Tom Fleming · Jul 4, 2011

Just to clarify Rusy's comment, copper plug wires are not a single wire. They are stranded to be flexble. Often times referred to as "solid" copper core.

John T · Jul 4, 2011

I'm in the Rusty camp, its more critical using a Magneto Ignition versus a battery powered coil distributor that the plugs and wires be NON RESISTIVE. The non resistive (plugs n wires) is a better impedance match up for a limited energy Magneto then the more forgiving higher energy battery powered ignition. An Autolite 386 or hotter 388 is in the correct heat range but they are resistive I believe while the similar heat range 3116 is not.

John T

Spark plugs and Magneto, do you need to use a certain plug?

Livin the Dream

Member

Tom Fleming

Well-known Member

rustyfarmall

Well-known Member

Tom Fleming

Well-known Member

John T

Well-known Member

Similar threads