TOHATSU MFS 40A Owner's Manual page 78

78
INSPECTION AND MAINTENANCE
2. Remove the top cowl.
3. Remove the spark plug caps.
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. The gap
should be 0.7-0.8 mm (0.028-0.031
inches). If the gap is different, 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.
10
8. Tighten the spark plug to the speci-
fied torque.
ENON00028-0
Note
Spark plug torque:
18.0 Nm (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.
ENON00938-0
Note
1.
2. Do not adjust the plug gap, if it is out of
ENOF00085-0
Do not clean electrodes of the spark
plug by a brush, or an iridium tip on the
electrodes could be damaged.
specification, replace the spark plug
with a new one.