Ignition Timing: Inspection

CAUTION: After warming-up, engine becomes very hot. Be careful not to burn yourself at measurement.

Idle the engine.
To check the ignition timing, connect a timing light to #1 cylinder spark plug cord, and illuminate the timing mark with the timing light.
Start the engine and check the ignition timing at the following idle speed.

Ignition timing [BTDC/rpm]:

13°+/-10°/650

Fig 1: Checking Ignition Timing

Courtesy of SUBARU OF AMERICA, INC.

If the timing is not correct, check the ignition control system. < Ref. to BASIC DIAGNOSTIC PROCEDURE . >