3-8
Inspection/Cleaning:
1) Visually inspect the spark plugs. Discard the plugs if the
insulators are cracked or chipped.
2) Remove carbon or other deposits with a plug cleaner.
Do not spray the cleaner more than 20 seconds.
3) Measure the plug gap with a wire-type feeler gauge.
If the measurement is out of the specification, replace the
spark plug.
NOTICE
4) Replace the spark plugs with the new ones if the center
electrode is rounded as shown.
• These outboard motors are equipped with the iridium
spark plugs. Do not adjust the spark plug gap.
• After cleaning the spark plugs with a plug cleaner,
remove the sand thoroughly from the spark plugs.
• Never clean the spark plugs with a stiff wire brush. It can
damage the fine-grain film of the iridium chips of the
iridium spark plug.
5) Make sure each sealing washer is in good condition.
With each spark plug sealing washer attached, thread the
spark plugs in by hand to seat the sealing washers and
prevent crossthreading.
Then tighten with a plug wrench (an additional 1/2 turn if a
new plug) to compress the sealing washer. If you are
reusing a plug, tighten 1/8 – 1/4 turn after the plug seats.
TORQUE: 18 N.m (1.8 kgf.m, 13 lbf.ft)
A loose spark plugs can become very hot and can damage
the engine. Overtightening the spark plugs can damage the
threads in the engine.
6) Install the ignition coils and tighten each with the 6 x 25
mm socket bolt securely (P. 3-7).
7) Connect the ignition coil 3P connector to each ignition coil
and install the PHC cover (P. 3-6 and 7).
8) Push in the two mud guard clips at the top of the under
cover grommet securely until they click.
9) Check that the lip at the reverse side of the under cover
grommet is engaged with the L./R. engine under covers
securely.
• Check that the under cover grommet adheres to the
engine under covers securely.
• If the projections on the reverse side of the under cover
grommet are out of position, set them on the under cover
grommet properly.
10) Install the engine cover (P. 4-2).
NOTICE
NOTICE
1.0 – 1.1 mm
(0.039 – 0.043 in)
[1]
SEALING
WASHER
[3] Damaged
washer
[5]
Center
electrode
[4]
Worn or
deformed
electrodes
[2] Cracked
insulation
[2]
MUD GUARD
CLIPS
[4] UNDER COVER
GROMMET
[1]
Lip on reverse
side of grommet.
[3] Projections on
reverse side of
grommet.
Recommended
IZFR6K11 (NGK)
spark plug
SKJ20DR-M11 (DENSO)
Spark plug gap
1.0 – 1.1 mm (0.039 – 0.043 in)
Service limit: 1.3 mm (0.051 in)