Ignition Timing
CAUTION:
Do not allow tachometer terminal to become grounded. This can damage igniter and/or coil.
- Engine must be at operating temperature. Connect tachometer and timing light to engine. Connect test probe of tachometer to negative (-) terminal of coil. Check timing with choke valve fully open, transmission in Neutral, all vacuum hoses connected, and accessories turned off. Adjust idle speed to specifications.
- On Land Cruisers with dual diaphragm distributors, disconnect and plug vacuum hoses at both main and sub-diaphragms.
- Adjust timing by turning distributor. Reconnect hoses to distributor diaphragms.
NOTE:
On Federal low altitude Land Cruiser models, flywheel timing mark should move when vacuum hose between HAC valve and distributor sub-diaphragm is pinched near valve. On high altitude models, timing mark should move when sub-diaphragm hose is reconnected.
IGNITION TIMING (DEGREES BTDC @ RPM)
| Application | Setting |
|---|---|
| Land Cruiser | 7° @ 950 |