Ignition Timing: 1.8L

Warm engine to normal operating temperature. Disconnect and plug distributor vacuum hoses (except SPFI equipped models). Place transaxle in Neutral (man. trans.) or "P" (auto. trans.) position.
On Turbo models, disconnect the Black 8-pin connector between distributor and knock control unit. On all models, adjust idle speed and check ignition timing. Ignition timing marks are visible through opening in flywheel cover on right side of engine.
If necessary, loosen distributor hold-down bolt and adjust ignition timing. Turn distributor clockwise to advance timing, turn distributor counterclockwise to retard timing. See Fig 1.

Fig 1: 1.8L Ignition Timing Adjustment

Courtesy of SUBARU OF AMERICA, INC.

IGNITION TIMING (DEGREES BTDC @ RPM)