The Champion RA8HC is a conventional spark plug with nickel alloy electrodes. This Champion Copper Plus Plus Small Engine spark plug features a copper core center electrode that provides increased conductivity and heat control for good overall wear.
The Champion RA8HC spark plug has corrugated ribs, gasket seal type, a nickel alloy center and ground electrodes, a 15.880 mm (0.625 in) hex size, and 0.76 mm (0.030 inches) spark plug gap.
General informational
| Specifications | |
| Spark plug model | Champion RA8HC (Part Number: 810) |
| Thread size | 12.0 mm (0.472 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 |
| Electrical terminal type | Removable Nut |
| Resistor | Yes |
| Heat range | 8 |
| 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 | 0.56-0.71 mm (0.022-0.028 in) |
| Center electrode | |
| Material | Nickel |
| Type | Standard |
| Size | 2.5 mm (0.1 in) |
| Ground electrode | |
| Material | Nickel Copper Alloy |
| Core material | Nickel |
| Type | Standard |
| Quantity | 1 |
| Tip design | J Gap |
Equivalents and alternatives
| Champion RA8HC cross reference to | |
| Accel | |
| 0882,742, 842, 882 | |
| ACDelco | |
| R121XLS, S123XL | |
| Autolite | |
| 2755, 3954, 3964, 4133, 4164, XS4164 | |
| Bonon | |
| D6RTC9 | |
| Bosch | |
| 0242135500, 0242135510, 0242140504, 242135500, 242135510, 242140504, XR4CS, XR7LDC, Y6DC, YR6LDE | |
| Bosna | |
| TWE85CP, TWE85CPR | |
| Brisk | |
| 1527, BR15YC | |
| Champion | |
| 810, 810S, A10, A8, A8Y, A8YC, R10, R8, RA8, RA89, RA8HC/053, RA8HC/T04, RA8HC/W24, RA8Y, RA8YC, stk 810 | |
| Denso | |
| 4086, 5375, IX22B, IXU22, VXU22, X16EPR-U9, X16EPRU9, X20E-U, X20EPR-U9, X20EPRU9, X20ES-U, X20ESR-U, X20ESU, X20EU, X22E-U, X22EP-GU9, X22EP-ZU9, X22EPR-GU9, X22EPR-U9, X22EPR-ZU9, X22EPRGL, X22EPRZU9, X22EPU9, X22EPZU9, X22ES-ZU, X22ESR-U, X22ESRU, X22ESU, X22ESZU, X22EU, X22SZ-U, X22SZU, X24EPR-U9, X24ESR-U, XU20EPRU, XU22EPR-U, XU22EPRU, XU22TT, Iridium IX22, Iridium IX24, Iridium stk 5371, Iridium stk 5372, stk 4089, stk 4091, stk 4096, stk 4101 | |
| General Motors | |
| 5614066 | |
| Harley Davidson | |
| 6R12 | |
| JF | |
| D7 | |
| Magneti Marelli | |
| 062110460312, CT7DKMR | |
| Mitsubishi | |
| MS851317 | |
| Motorcraft | |
| HG22C, HG2C, stk 113, stk 87 | |
| NCOSP | |
| D7 | |
| NGK | |
| 2887, 3108, 3481, 3932, 5531, 7512, D6EA, D7EA, D7ES, D7EV, DCPR6E, DCPR7E, DCPR7EA-9, DP5EA-9, DP6EA-9, DP6EA9, DP7EA-9, DP7EA9, DP7EV9, DPR5EA-9, DPR5EA9, DPR6EA, DPR6EA-9, DPR6EA9, DPR6EB9, DPR7EA9, DPR7EV9, DR7EA, DR7ES, DR8ES, DR8ES-L, stk 2825, stk 2923, stk 3123, stk 3932, stk 5423, stk 7512, stk 7839 | |
| NHSP | |
| DF7REC2 | |
| Prestolite | |
| 12G2,12G3 | |
| Splitfire | |
| SF416D | |
| Torch | |
| D6RTC-9, D6RTC9, D6TC-9, D6TC9, D7RTC, D7TC, D7TC-9, D7TC9, DK6RTC, DK7RTC | |
| Valeo | |
| 246888 | |
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