Spark Plug Replacement

REMOVAL PROCEDURE




1. Remove the engine sight shield, if necessary.
2. Disconnect the spark plug wire from the spark plug.
^ Twist each spark plug wire 1/2 turn.
^ Pull only on the boot in order to remove the wire from the plug.




3. Loosen the spark plug 1 or 2 turns.
4. Brush or air blast away any dirt from around the spark plug.
5. Remove the spark plug. If removing all the plug at one time, place each plug in a tray marked with the corresponding cylinder numbers.

INSTALLATION PROCEDURE




1. Proper position the spark plug washer.
2. Inspect the spark plug gap. Adjust the plug as needed.

Specification
Spark plug gap: 1.52 mm (0.060 in)

3. Hand start the spark plug.

NOTE: Refer to Fastener Notice in Service Precautions.

4. Tighten the spark plug.

Tighten
^ For used heads tighten the plug to 15 N.m (11 lb ft).
^ For new aluminum heads tighten the plug to 20 N.m (15 lb ft).
^ For new iron heads, tighten the plug to 30 N.m (22 lb ft).




5. Install the spark plug wire to the spark plug.
6. Inspect the wire for proper installation:
^ Push sideways on each boot in order to inspect the seating.
^ Reinstall any loose boot.
7. Install the engine sight shield, if necessary.