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Ignition Timing

  1. Ensure engine is at normal operating temperature and idle speed is correct. Shift transaxle to Neutral (M/T) or Park (A/T) position. Connect timing light to No. 1 spark plug wire.
  2. Observe timing marks, located on crankshaft pulley. See IGNITION TIMING SPECIFICATIONS  table. If timing is not as specified, check self-diagnostic system for Diagnostic Trouble Codes (DTCs). Repair as necessary. See SELF-DIAGNOSTICS article.
    IGNITION TIMING SPECIFICATIONS (1) (Degrees BTDC @ RPM)

    Application Auto. Trans. Man. Trans.
    Forester & Impreza 15 @ 700 10 @ 650
    Legacy 10 @ 700 10 @ 650
    (1) To improve stability, timing is controlled while engine is idling. Timing range is plus or minus 8 degrees (10 degrees on Legacy).
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