Is qc12yc the same as rc12yc?

Premium Member. From what I can find the two plugs have the same heat range so are interchangeable without any difference in mechanical engine performance. BUT if you have a fuel injected engine you should use the QC plug. It’s internal electrical construction is different to work properly with fuel injection systems.

What does a RC12YC Champion spark plug fit?

Genuine Champion RC12YC Spark Plug Replaces Ariens 08811700, 21531100, 21534100, 21536800, Briggs & Stratton 491055, 491055S, 499608, 692051, 72347GS, 792015, 805015 Cub Cadet 759-3336 Gravely 21531100, 21534100, 21536800 Husqvarna 531 30 81-28 John Deere M78543 Kohler 12 132 02, 12 132 02-S MTD 759-3336.

What does the Q mean on a Champion spark plug?

“Q” Type: Uses a wire wound inductive coil (or electromagnetic suppression) to reduce RFI without negatively affecting ignition performance. “Q” type suppressor plugs are specified for most Evinrude and Johnson outboard engines with CDI. “X” Type: Have a special resistor to meet more stringent RFI requirements.

What is a resistor type spark plug?

Resistor type spark plug’s incorporate an internal resistor to suppress ignition noise generated during sparking. Put simply, when a spark is formed it creates a mini-earthquake in the electronic world; the internal resistor in a spark plug filters out the noise created that may affect electrical components.

What Spark Plug model does my rc12yc have?

The spark plug model is listed on the inside of the hood – RC12YC which is different than the one listed in the manual. When I finally changed the spark plug, it had the Champion 3071. Are these equivalent and how do they compare?

What is the gap on rc12yc champion 3071?

So far, all I can find on the 2 plugs is that # 3071 is a Platinum “Super plug” version of the standard RC12YC plug which uses Copper. Interestingly, I found the gap listed as .040″ for both plugs. I carefully checked again the gap on my Champion 3071, and it is .030 inches.

Is rc12yc an acceptable substitute for qc12yc?

The QC12YC questions came up at one of my engine update classes a few years back and was told the the RC12YC was an acceptable substitute for the QC12YC since it was not available as an aftermarket replacement at the time. I know this is old but can someone clarify what the plug differences are?