TOHATSU M 2.5A2 Owner's Manual page 39

Replacing the spark plugs
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• 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
touched. Allow motor to cool down first.
If the spark plug(s) is fouled, has
carbon build up, or is worn, it should
be replaced.
When reusing spark plugs, remove
dirt from the electrodes and adjust
spark gap to specification.
Note
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.
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 21 mm
(13/16 in) socket wrench and handle.
Socket wrench
INSPECTION AND MAINTENANCE
5 Attach spark plug and tighten to
specified torque.
Use spark plugs (NGK BP6HS-10 or
BP6RHS-10) or recommended ones.
Spark gap : 0.9 - 1.0mm
Electrode
Note
Tighten the spark plug by 1/2 - 3/4
turn to secure it after it touches the
washer on the cylinder head.
Note
• Spark plug torque :
27.0 Nm (20.0 ft-lb) (2.7 kgf-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.
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Never remove the plug cap cover when
the engine is running.
It is dangerous to touch the high-
tension cable inside the plug cap cover.
39
(0.035 - 0.039 in)
9