TOHATSU MFS 40A Owner's Manual page 75

4. Remove the spark plugs by turning it
counter-clockwise, using a 5/8" (16
mm) socket wrench and handle that
is provided in tool bag.
5. Inspect the spark plug. Replace the
spark plug if the electrodes are worn
or if the insulators are cracked or
chipped.
6. Measure the spark plug electrode
gap with a wire type feeler gauge.
T h e g ap sh ould b e 0.7 - 0. 8 mm
(0.028-0.031 in). If the gap is differ-
ent, replace the spark plug with a
new one
Use spark plug ; NGK IKR6G8
1
2
1. Electrode
2. Spark gap (0.7–0.8 mm, 0.028–0.031 in)
7. Install the spark plug by hand and
turn it carefully to avoid cross-
threading.
8. Tighten the spark plug to the speci-
fied torque.
ENON00028-0
Note
Spark plug torque:
18.0 N·m (13.3 ft·lb) [1.84 kgf·m]
If a torque-wrench is not available when
you are fitting a spark plug, a good esti-
mate of the correct torque is 1/4 to 1/2 a
turn past finger-tight. Have the spark plug
adjusted to the correct torque as soon as
possible with a torque-wrench.
ENOF00085-0
INSPECTION AND MAINTENANCE
75
10