Ignition Timing: Adjustments

Fig. 53 Connecting Tachometer:

1. Start engine and allow to reach normal operating temperature.
2. Connect a tachometer test probe to the distributor terminal service connector. Fig. 53

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. Consult the operating manual for your instrument.

Fig. 46 Shorting Check Connector Terminals:

3. Using a service wire, connect terminals TE1 and E1 of the check connector. Fig. 46
4. Run the engine at 1,000 - 1,300 rpm for 5 seconds, and check that engine returns to idle speed.

Idle Speed: 700 rpm ± 50

Fig. 47 Base Ignition Timing Marks:

5. Using a timing light, verify that the timing mark on timing cover is aligned with the mark on the crankshaft pulley. Fig. 47

Ignition Timing: 10° BTDC at idle

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

Fig. 47 Base Ignition Timing Marks:

9. Check idle advance timing with service wire removed. Fig. 48

Ignition Timing: 13 - 22° BTDC at idle

10. Disconnect tachometer and timing light from engine.