TOHATSU 40B2 Owner's Manual page 72

72 INSPECTION AND MAINTENANCE
!
Do not hold propeller with hand(s)
when loosening or tightening propeller
nut. Put a piece of wood block between
propeller blade and anti-ventilation
plate to hold propeller.
!
● Do not install propeller without thrust
holder, or propeller boss could be
damaged.
● Do not reuse split pin.
● After putting split pin, open the end
to prevent it from coming off which
could lead to coming off of propeller.
Replacing the spark plugs
!
● Do not reuse spark plug with damaged
insulation, 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 and could cause severe burns if
10
touched. Allow motor to cool down
first.
Notes
When inspecting the plug, always
clean the gasket surface and use a
new gasket. Wipe off any dirt from the
threads and screw in the spark plug
to the correct torque.
If the spark plug(s) is fouled, has
carbon build up, or is worn, it should
be replaced.
WARNING
CAUTION
WARNING
When reusing spark plugs, remove
dirt from the electrodes and adjust
spark gap to specification.
① Remove the top cowl.
② Remove the spark plugs by turning
counter-clockwise with the socket
wrench (16mm: 5/8 in) fitted with
the handle. Tap lightly on the spark
plugs if they are hard to turn.
Use spark plug NGK IZFR6Q.
Spark gap : 0.8 - 0.9mm
(0.031 - 0.035 in)
NGK IZFR6Q (30 · 40 · 50 · 75 · 90)
NGK IZFR5J (115)
Notes
◎ Spark plug torque :
18.0Nm(13.3ft-lb)(1.8kgf-m)
If a torque-wrench is not available
when you are fitting a spark plug, a
good estimate 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.
CAUTION
!
Do not touch the high tension cords
running from the ignition coil to the
spark plugs while the engine is running
or is turned by the electric starter
motor, not even for testing the high
tension cords or the spark plugs.
The high tension cords and the spark
plugs generate very high electric
voltage, which can cause a serious
electric shock if touched.