Ignition Timing
| Spark Control Computer | 5226411 | 5226433 | 5226439 | 5226451 | 5226455 | 5226645 |
| Basic Timing | 12 Degrees Before Top Dead Center (deg BTDC) | 10 Degrees Before Top Dead Center (deg BTDC) | 10 Degrees Before Top Dead Center (deg BTDC) | 10 Degrees Before Top Dead Center (deg BTDC) | 10 Degrees Before Top Dead Center (deg BTDC) | 15 Degrees Before Top Dead Center (deg BTDC) |