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 AND TOLERANCE CHART
| Revolution (RPM) |
1,000 |
2,000 |
3,000 |
4,000 |
| Tolerance (RPM) |
+/-100 |
+/-120 |
+/-135 |
+/-150 |
| Revolution (RPM) |
5,000 |
6,000 |
7,000 |
8,000 |
| Tolerance (RPM) |
+/-170 |
+/-190 |
+/-210 |
+/-230 |