## Spark Plug Inspection - L15A1 (IN model) and L15A6

1. | Inspect the electrodes and ceramic insulator. Burned or worn electrodes may be caused by: Advanced ignition timing Loose spark plug Plug heat range too hot Insufficient cooling Fouled plug may be caused by: 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

2. | Check the electrode gap (A). If the gap is over the standard, adjust the gap with suitable gapping tool.
Electrode Gap
Standard (New): | 1.0-1.1 mm (0.039-0.043 in.)

3. | Replace the plug at the specified interval, or if the center electrode is rounded (A). Use only the spark plugs as listed.
Spark Plugs
L15A1 engine (IN model):
NGK: | ZFR6K-11
DENSO: | KJ20DR-M11
L15A6 engine:
NGK: | ZFR6J-11
DENSO: | KJ20CR-M11

4. | Apply a small quantity of anti-seize compound to the plug threads, and screw the plugs into the cylinder head finger-tight. Then torque them to 18 N·m (1.8 kgf·m, 13 lbf·ft).