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Champion RC12YC is the common resistor plug behind many Briggs and Kohler OEM numbers. Gap and heat-range still must match the engine chart.
| Brand | OEM / retail IDs |
|---|---|
| Champion | RC12YC / 71 / OE013-class listings |
| Briggs & Stratton | 491055S, 692051, 5066/696202 platinum path |
| Kohler | 12 132 02-S, also listed with 12 132 06-S / 25 132 12-S on dealer charts |
| NGK (often listed) | BCPR5ES (verify before substituting) |
| Do not assume | Why |
|---|---|
| RC14YC / hotter plugs | Different heat range (Briggs lists separate numbers) |
| EMS / QC12YC rows | Briggs EMS plugs are a different FAQ row |
| Gap always .030" | Confirm on the specific engine FAQ / IPL |