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.
TACHOMETER REFERENCE CHART
| Revolution (rpm) |
1, 000 |
2, 000 |
3, 000 |
4, 000 |
| Tolerance (rpm) |
±100 |
±125 |
±150 |
±170 |
| Revolution (rpm) |
5, 000 |
6, 000 |
7, 000 |
| Tolerance (rpm) |
±200 |
±240 |
±260 |