Ignition Timing: Adjustments

1. Precondition the engine as follows:
a. Engine coolant temperature greater than 185 degrees F.
b. Lights, electric cooling fan, and all electrical accessories off.
c. Transmission in neutral or park.
d. Steering wheel in the neutral position.
2. Connect a timing light.

Tachometer Lead Connector Location:

3. Insert a paper clip into the idle speed connector (blue).

Tachometer Installed:

4. Connect a tachometer to the inserted clip.

Ignition Timing Adjustment Terminal Location:

5. With the ignition OFF, remove the waterproof plug from the connector (brown) for ignition timing adjustment and ground the terminal using a jumper wire.
6. Start the engine and allow it to run at curb idle speed.
7. Verify Curb Idle Speed.

Curb Idle Speed:
700 +/- 100 rpm

NOTE: The tachometer should read at 1/3 of the actual engine speed. Multiply the reading by 3 to obtain the correct RPM.

Ignition Timing Inspection:

8. Verify Basic Ignition Timing

Basic Ignition Timing:
5 +/- 2 degrees BTDC

9. If necessary loosen the distributor mounting nut and adjust timing by rotating the distributor.
10. Stop the engine and disconnect the grounding jumper.