Ignition Timing: Adjustments

Tachometer Hookup:

1. Start engine and allow to reach normal operating temperature.
2. Connect a tachometer test probe to terminal IG of the check connector.

NOTE: Never let the tachometer lead touch ground as this could cause damage to the igniter and/or coil. Be sure to check that your tachometer is compatible with this ignition system before using it. Consult the operating manual for your instrument.

Fig. 58 Test Connector And Service Wire:

3. Using a service wire, connect terminals T and E1 of the check connector.
4. Using timing light, verify that the timing mark on timing cover is aligned with the mark on the crankshaft pulley.

Ignition Timing: 10° BTDC at idle

5. If not as specified, loosen distributor hold-down bolt and rotate housing until the marks align.
6. Tighten the distributor bolt and recheck the ignition timing.
7. Remove service wire.

Advance Ignition Timing Marks:

8. Check idle advance timing with service wire removed.

Ignition Timing: 13 - 22° BTDC at idle

9. Disconnect tachometer and timing light from engine.