Component Testing: Tachometer
Connect a test tachometer to engine. Start engine and compare vehicle tachometer reading with test tachometer. See appropriate TACHOMETER ALLOWABLE VARIATION table for tachometer allowable error.
TACHOMETER ALLOWABLE VARIATION
| Standard Indication: RPM | Allowable Range: RPM |
|---|---|
| 1000 | 900-950 |
| 2000 | 1900-1950 |
| 3000 | 2900-2950 |
| 4000 | 3900-3950 |
| 5000 | 4900-4950 |
| 6000 | 5900-5950 |