Ignition Timing: Adjustments

Before adjusting the ignition timing, be sure:
^ Engine coolant temperature has reached 85-95~C (185-205~F)
^ Lights, electric cooling fan and all accessories are OFF
^ Transmission is in NEUTRAL or PARK.
^ Parking brake is applied.

1. Connect a tachometer and a timing light.
Refer to equipment manufacturer's installation instructions.

Tachometer Connection:

2. If the tachometer used is not an induction type, insert a paper clip at the wire side of the connector, and connect the tachometer to the paper clip. Do not disconnect the connector.

Connector For Adjusting Ignition Timing:

3. Disconnect the waterproof connector from the Ignition Timing Adjustment Terminal, and ground it using a lead wire with alligator clips.
4. Start the engine and run at CURB idle speed.

Ignition Timing Mark:

5. Aim the timing light at the timing mark to read BASIC ignition timing. Refer to SPECIFICATIONS/ELECTRICAL.
If timing is within specifications, proceed to step 8.
^ If flash occurs before specified degree mark, timing is advanced.
^ If flash occurs after specified degree mark, timing is retarded.

Adjusting Basic Ignition Timing:

6. To adjust ignition timing, loosen the distributor mounting nut just enough that the distributor housing can be rotated in its mounting. Turn distributor housing until specified value is reached.
7. Tighten the mounting nut and recheck timing.
8. Disconnect the lead wire connected in step (3).
9. Check to be sure that the ignition timing advances to ACTUAL ignition timing. Refer to SPECIFICATIONS/ELECTRICAL.

NOTE:
a. ACTUAL ignition timing may fluctuate according to the mode of the Control Unit. Recheck the BASIC ignition timing. Timing is correct if there is no fluctuation.

b. At altitudes of approximately 700m (2,300 ft.) or more above sea level, the ACTUAL ignition timing may advance further.