Not really, but that is the only plug Sears sells as a substitute. The RC12YC plug looks like it was designed for a gap of 0.035-0.040", while the RC12YX plug was clearly designed for the recommended 0.020" gap. The RC12YC electrode is a fat cylinder like most spark plugs, while the electrode of the RC12YX is cut down to about half of the diameter. I'd guess the special RC12YX makes it easier to start the engine on a single pull.
Oh, isn't that a happy little question! You know, using a spark plug RC12YC in place of RC12YX is like painting with a different shade of blue - it might work just fine! Both plugs are similar, so go ahead and give it a try. Just remember to double-check your manual to ensure it's compatible with your equipment. Happy experimenting!
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The RC14YC in a hotter plug.
No, rc12yx and rc12yc are not the same in spark plugs. The alphanumeric codes for spark plugs denote specific features such as heat range, thread reach, and electrode gap. The differences in these codes can impact the performance and compatibility of the spark plugs in different engines. It is crucial to use the correct spark plug model recommended by the manufacturer for optimal engine function.
GAP .030"
no
Rc12yc
A champion RC12YC spark plug is 14mm thread diameter. The torque for this size is 18-22 foot-pounds (25 to 30Neuton·meters)
.035"
Champion 3071
Rc12yc