( TL19E20A26100055901MAAT00 )

Spark Plug Inspection

1. Remove the spark plugs and inspect the electrodes and ceramic insulator.
   - Burned or worn electrodes may be caused by these conditions:

   - | Advanced ignition timing
   - | Loose spark plug
   - | Plug heat range too hot
   - | Insufficient cooling

   - Fouled plugs may be caused by these conditions:

   - | Retarded ignition timing
   - | Oil in combustion chamber
   - | Incorrect spark plug gap
   - | Plug heat range too cold
   - | Excessive idling/low speed running
   - | Clogged air cleaner element
   - | Deteriorated ignition coils

1. If the spark plug electrode is dirty or contaminated, clean the electrode with a plug cleaner.
   NOTE:
   - Do not use a wire brush or scrape the iridium electrode since this will damage the electrode.
   - When using a sand blaster spark plug cleaner, do not clean for more than 20 seconds to avoid damaging the electrode.

1. Do not adjust the gap (A) of iridium tip plugs; replace the spark plug if the gap is out of specification.

   Electrode Gap
   Standard (New): | 1.0−1.1 mm (0.039−0.043 in.)

1. Replace the plug at the specified interval or when the center electrode is rounded (A). Use only the listed spark plugs.

   Spark Plugs
   NGK: | IZFR6K11NS
   DENSO: | SKJ20DR-M11S

1. Apply a small amount of anti-seize compound to the plug threads, and screw the plugs into the cylinder head, finger-tight. Then torque them to 25 N·m (2.5 kgf·m, 18 lbf·ft).