TOHATSU MFS 4D Owner's Manual page 61

ENOM00087-A
Spark plugs replacement
ENOW00087-1
WARNING
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.
ENOW00929-0
CAUTION
Use only the recommended spark plugs.
Spark plugs which have an different heat
range may cause engine damage.
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.
When reusing spark plugs, remove dirt
from the electrodes and check the spark
plug gap.
1. Stop the engine.
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
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.
6. Measure the spark plug gap with a
wire t ype fe eler g auge. The g ap
should be 0.8-0.9 mm (0.031-0.035
in). If the gap is out of specification,
replace the spark plug with a new one
INSPECTION AND MAINTENANCE
Use spark plug NGK DCPR-6E.
1
2
1. Electrode
2. Spark gap (0.8–0.9 mm, 0.031–0.035 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.
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