6.6.1 Disconnect the spar
k
plug lead
(
1
)
and use the spar
k
plug wrench
(
3
)
to remove
the spar
k
plug
(
2
)
)in a counter-cloc
k
wise direction.
6.6.2 If the spar
k
plug is fouled or is soa
k
ed with fuel,clean or replace the plug as
re
q
uired.
6.6.3
Remove
e
x
cess fuel from the com
b
ustion cham
b
er
b
y cran
k
ing the engine
several times while the spar
k
plug is removed. Be sure to have the ON/OFF switch in
the OFF position.
6.6.4 Install the spar
k
plug and firmly tighten it with the spar
k
plug wrench. If a
tor
q
ue is availa
b
le to
rq
ue the spar
k
plug to 148
to
16
5
inch
/
pounds. Reconnect the
spar
k
plug lead.
6.6.
5
Repeat the starting procedure for a WARM engine.
6.6.6 If the engine still fails to fire or start, refer to the trou
b
leshooting flowchart at
the end of the manual.
Fitting
an
i
ncorrect spar
k
plug can result in serious engine damage!
6.7 Ad
j
usting the engine idle speed.
6.7.1 Start the engine
b
y following the procedures descri
b
ed in the preceding pages.
6.7.2 Run the engine at idle speed until operating temperature is reached. This
generally ta
k
es 2
/
3 minutes.
6.7.3
U
se a screwdriver to ad
j
ust the engine
idle speed
screw (
1
)
) to 3000
±
200rpm.
Turn the idle screw cloc
k
wise to INCREASE engine idle speed.
Turn the idle screw counter-cloc
k
wise to DECREASE engine idle speed.
Machine tu
b
es and inta
k
e cover must
b
e installed while ad
j
u
s
ting
engine idle. Engine idle speed will also
b
e aff
e
ct
e
d if either the inta
k
e
cover or machine tu
b
es are
b
loc
k
ed, d
a
m
a
ged or incorr
e
ctly installed.
Page 13
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