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CAUTION:

Do not attempt to adjust the gap of the indium plug.
Cleaning of the iridium plug may result in damage to the iridium tip. Therefore, if carbon deposits must be removed, use a plug cleaner and complete cleaning within 20 seconds to protect the electrode. Do not use a wire brush.

Fig 1: Checking Plug
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Check the plug gap and replace if the limit is exceeded.

Standard value: 0.7 - 0.8 mm (0.028 - 0.031 inch)

Limit: 1.0 mm (0.039 inch)