TOHATSU MFS 75A Owner's Manual page 78

78
INSPECTION AND MAINTENANCE
6. Tighten the propeller nut to specified
torque and align one of the grooves
with propeller shaft hole.
Propeller nut torque:
35 N·m (25 ft
7. Install a new split pin into the nut hole
and bend both ends of pin apart to
lock propeller in place.
ENOM00087-D
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 plugs immediately
after stopping engine as they will be hot
10
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.
· ·
lb, 3.5kgf m)
ENOF00084-E
WARNING
CAUTION
If the spark plug(s) is fouled, has carbon
buil d up , or is w orn , it sh o ul d b e
replaced.
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 electrode
and if the insulators are cracked or
chipped.
6. Measure the spark plug electrode gap
with a wire type feeler gauge. The gap
should be 0.8-0.9 mm (0.031-0.035
in). If the gap is out of specification,
replace the spark plug with a new one
Use spark plug ; NGK LKR6E
1
2
1. Electrode
2. Spark gap (0.8–0.9 mm, 0.031–0.035 in)
7. Install the spark plug and turn it care-
fully to avoid cross-threading.
ENOF00085-0