Ignition Timing: Adjustments

NOTE: Self powered timing lights may not function. Use a vehicle powered timing light for checking of ignition timing.

1. Run engine until it is at operating temperature.
2. Turn off all electrical loads.
3. Connect a tachometer.
4. Check the idle speed. Set to the specified idle speed if necessary.
5. Connect a timing light to the leading spark plug high-tension lead on the front rotor housing.

Fig. 5 Location of leading and trailing timing marks:

Ignition timing;

Leading 5° ATDC (Yellow mark)
Trailing 20° ATDC (Red mark)

6. Check that the mark on the pulley and indicator pin are aligned. Fig. 5.
7. If the marks aren't aligned, loosen the crank angle sensor installation bolt and turn it to make the adjustment.
8. Check the trailing side with the same procedure as the leading side.

Fig. 6 Testing centrifugal advance:

9. Increase the engine speed and check that the ignition timing advances. Fig. 6.
10. Disconnect the timing light.