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.
REVOLUTION TOLERANCE REFERENCE CHART
| Revolution (RPM) |
Tolerance (RPM) Max 8000 RPM |
| 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 |