The Champion QC12YC is a conventional spark plug with nickel alloy electrodes. This Champion spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear.
The Champion QC12YC spark plug has corrugated ribs, gasket seal type, a nickel alloy center and ground electrodes, a 16.0 mm (5/8 inches) hex size, and 0.75 mm (0.030 inches) spark plug gap.
General informational
| Specifications | |
| Spark plug model | Champion QC12YC (Part Number: 946) |
| Thread size | 14.0 mm (0.55 in) |
| Thread pitch | 1.25 mm (0.050 in) |
| Reach | 19.0 mm (0.75 in) |
| HEX size | 16.0 mm (0.629 in) |
| Seat type | Gasket |
| Terminal type | Solid |
| Resistor | Yes |
| Resistor type | Inductive |
| Heat range | 12 |
| Torque specs | Cast Iron: 35-40 Nm (3.6-4.0 kg·m; 25.8-29.5 lb·ft) Aluminum: 25-29 Nm (2.5-3.0 kg·m; 18.4-21.6 lb·ft) |
| Gap | 0.75 mm (0.030 in) |
| Longevity | 32,000 km (20,000 miles) |
| Center electrode | |
| Material | Nickel |
| Type | Standard |
| Size | 2.5 mm (0.098 in) |
| Projection | Projected |
| Ground electrode | |
| Material | Nickel |
| Type | Standard |
| Quantity | 1 |
Equivalents and alternatives
| Champion QC12YC cross reference to | |
| AC Delco | |
| 41-603, 41800 | |
| Accel | |
| 416 | |
| Autolite | |
| 3924, XS3924, XST3924 | |
| Beru | |
| 14F-8DU, 14FR-8DU | |
| Bosch | |
| +6 | |
| Briggs & Stratton | |
| 691043, 692720, 792015 | |
| Brisk | |
| 1326, D17Y, DR17YC | |
| Champion | |
| 946, CCH946, QC12YC/T04, stk 946 | |
| Denso | |
| 3137, 5301, IQ16, Q16PR-U, Q16PRU, Q16TT | |
| Eyquem | |
| FC42LS | |
| Honda | |
| 98079-55158 | |
| Iskra | |
| SFE55PRS | |
| Kohler | |
| 2013202 | |
| Magneti Marelli | |
| 062110230312 | |
| Motorcraft | |
| AGSP32CF4 | |
| NGK | |
| 1667, 2460, 7938, BKR5E, BKR5ES, V-line-35, stk 7938 | |
| Splitfire | |
| SF392D | |
| Torch | |
| K5RTC | |
| Unipart | |
| GSP2022 | |
| Valeo | |
| 246853 | |
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