With the engine started, compare the readings of the tester with that of the tachometer. Replace the tachometer if the tolerance is exceeded.
CAUTION:
- Reversing the connections of the tachometer will damage the transistor and diodes inside.
- When removing or installing the tachometer, be careful not to drop it or subject it to severe shock.
TOLERANCE REVOLUTION SPECIFICATION CHART
| Revolution (rpm) |
Tolerance (rpm) |
| Max 8000rpm |
| Gasoline |
| 1,000 |
±100 |
| 2,000 |
±100 |
| 3,000 |
±100 |
| 4,000 |
±100 |
| 5,000 |
±100 |
| 6,000 |
±100 |
| 7,000 |
±100 |
| 8,000 |
±100 |