Farmall Cub

What's with the different spark plugs used in the 184? Here is what it has in the CNH Parts & Service. My tractor currently has the Champion RD18Y plug. I mow grass, blow snow, and rototill a little. The latter two really push the capabilities of the tractor. I've never fouled a plug and all of the plugs are currently clean & dry with just a hint of white on them (slightly lean). Which one do I pick?

RD18Y SPARK PLUG PLUG, spark, light service, champion
RD15Y SPARK PLUG PLUG, spark, moderate service, champion
RD6 SPARK PLUG PLUG, spark, heavy service, champion
18R52 PLUG, spark, moderate service, prestolite

Based on your description I'd stay with what you have.

Or . . . . If the "light duty" plug is hotter, it will be whiter when your working it hard. Blower and tiller would be considered hard service, mowing not so much. So a heavy service plug would be colder and probably bring you into a closer range of tan, but maybe be dark when your just mowing.

Stick with a winner.

Don't fix what ain't broke! It sounds like your current plugs are doing just fine.

There is significant wear on the electrode. Also started to miss yesterday so I started looking into plugs, wires, and distributer cap.
Ran great this morning so I think it was more moisture related because we both (tractor and I) took a couple of major snowbaths while running the blower.
Kinda looked like the abominable snowman driving a tractor!

Outdoors,
Next time before you go out to make 'white blizzards' - try spraying the distributor cap and wires with some silicon spray. It helps keep the moisture out.
NJDale