Spark Plug Selection

Wed Feb 02, 2011 6:00 pm

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

Re: Spark Plug Selection

Wed Feb 02, 2011 7:50 pm

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

Re: Spark Plug Selection

Wed Feb 02, 2011 8:00 pm

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.

Re: Spark Plug Selection

Wed Feb 02, 2011 10:05 pm

Stick with a winner.

Re: Spark Plug Selection

Thu Feb 03, 2011 7:30 am

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

Re: Spark Plug Selection

Thu Feb 03, 2011 8:12 am

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!

Re: Spark Plug Selection

Thu Feb 03, 2011 10:38 am

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