System Test

Fig. 35 Testing Spark Control System:

1. Start the engine and warm-up to normal operating temperature.
2. Connect a strobe timing light and check the ignition timing at idle.

Ignition Timing: Approx. 13° BTDC at Max. 950 rpm

3. Disconnect the distributor sub-diaphragm vacuum hoses and plug the hoses. Fig. 35
4. Check the ignition timing at idle.

Ignition Timing: 5° BTDC at Max. 950 rpm

5. If not as specified, test each component in the SPK system.
6. Reconnect vacuum hoses and disconnect timing light.