Johnson
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Champion Spark Plugs for Johnson Inboard MotorsChampion spark plugs are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance. Please view the application guide below. You may also find the Champion spark plug code helpful. |
| Year | Model / Engine | Copper Plus Plug | Alternate Plug | Gap |
|---|---|---|---|---|
| 210 HP | ||||
| TU-17 283 CID V8 | RJ14YC | — | 0.035 | |
| TU-17 307 CID V8 | RJ14YC | — | 0.035 | |
| 200 HP | ||||
| TU-14 300 CID V8 | RJ14YC | — | 0.035 | |
| TU-15 300 CID V8 | RJ14YC | — | 0.035 | |
| TU-16 300 CID V8 | RJ14YC | — | 0.035 | |
| 185 HP | ||||
| KU 283 CID V8 | RJ12YC | J12YC | 0.035 | |
| 155 HP | ||||
| HU 225 CID L6 | RJ14YC | — | 0.035 | |
| 150 HP | ||||
| HU 225 CID L6 | RJ14YC | — | 0.035 | |
| 120 HP | ||||
| CU 153 CID L4 | RN5C | N5C | 0.035 | |
| SU 153 CID L4 | RN5C | N5C | 0.035 | |
| 110 HP | ||||
| CU 153 CID L4 | RN5C | N5C | 0.035 | |
| SU 153 CID L4 | RN5C | N5C | 0.035 | |
| 90 HP | ||||
| CU 153 CID L4 | RN5C | N5C | 0.03 | |
| SU 153 CID L4 | RN5C | N5C | 0.025 | |
| 88 HP | ||||
| DU 89 CID | J4C | — | 0.03 | |
| 80 HP | ||||
| NU 1600CC | RN9YC | N9YC | 0.025 | |