Every 6, 000 Miles

1. Clean and adjust spark plugs. Adjust ignition timing and point dwell. Check air cleaner filter, replace if necessary.
2. Adjust idle speed and check CO level using a suitable exhaust gas analyzer. Check for engine miss at idle and during acceleration.

In addition, the following is recommended for early models (prior to 1969).

1. Check automatic choke (with engine cold). Check engine compression, check and adjust valves.
2. Clean fuel filter, check float level. Check thermostat operation.