TOHATSU MFS 40A Owner's Manual page 80

80
INSPECTION AND MAINTENANCE
ENOM00087-C
Spark plugs replacement
ENOW00087-1
Do not reuse spark plug, if the insulation
is damaged or sparks can leak through
crack, potentially leading to electric
shock, explosion and/or fire.
Do not touch spark plug(s) immediately
after stopping engine as they will be hot
and could cause severe burns if touched.
ENOW00929-A
Use only the recommended spark plugs.
Spark plugs which have an different heat
range may cause engine damage.
Do not clean electrodes of iridium spark
plug. If it is contaminated with carbon
deposit or dirt, replace with a new one.
Do not adjust the plug gasp, if it is out of
specification, replace with a new one.
If the spark plug(s) is fouled, has carbon
b uil d up , or is w or n , i t sh o ul d b e
replaced.
1. Stop the engine.
2. Remove the top cowl.
10
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
are provided in the tool bag.
5. Inspect the spark plug. Replace the
spark plug with wear on electrodes
and if the insulators are cracked or
chipped.
WARNING
CAUTION
6. Measure the spark plug gap with a
wire t ype feeler g auge. The g ap
should be 0.7-0.8 mm (0.028-0.031
in). If the gap is out of specification,
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.
ENON00028-2A
Note
Spark plug tightening torque:
18 N·m (13 ft·lb) [1.8 kgf·m]
If a torque-wrench is not available when
you are installing a new spark plug, tighten
it 1/4 to 1/2 a turn past finger-tight. If reus-
ing a spark plug, tighten 1/12 a turn past
finger tight. Have the spark plug adjust-
ment to the correct torque as soon as
possible with a torque-wrench.
ENON00938-0
Note
1. Do not clean electrodes of the spark
plug by a brush, or an iridium tip on the
electrodes could be damaged.
2. Do not adjust the plug gap, if it is out of
specification, replace the spark plug
with a new one.
ENOF00085-0