LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2021 >> CX-9 Signature >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Spark Plug Inspection >> Plug Gap Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Plug Gap Inspection

CAUTION:
  • To avoid possible damage to the tip, do not adjust the plug gap.
  • To prevent damaging the tip, use a wire type plug gap gauge when inspecting the plug gap.
  1. Measure the spark plug gap using a wire type plug gap gauge.
    • If not within the standard specification, replace the spark plug.

      Spark plug gap 

      Standard:  0.70-0.85 mm {0.028-0.033 in}

      New spark plug (reference):  0.70-0.80 mm {0.028-0.031 in}