6
NOTE:
Whtn
meking adjustments of
die idle mixture needle,
do n o t turn t h e needle more than
1
i
8
of
a tum per
adjustment.
If
you have difficulty
establishing
a starting
point
during
these adjustment procedures, the mixture needle should be
adjusted to its initial setting.
To do
this:
1.
Gently seat (tum
in
all the way)
the
idle mixture
needle
by turning
it clockwise.
2.
Turn the needle
out 1-1/8 turns (Zama,
T.K.)
or
2-1/4 to
2-1 /8 turns (Keihin).
3.
Start
the engine and
make whatever adjustments to the
mixture needle that are necessary
to
achieve a smooth
steady
i
dl
e
.
NOTE:
As
altitude
i
nc
reases
substantially, to approxi
mately
5.000
feet
(1500
meters) and above,
it
may
be
necessary
to
adjust the mixture
needle sli
gh
t
ly below
the
sea
level
setting.
I
dl
e
Sp
eed Screw (!)
Correct
idle
speed
is
just below clutch
engagement
(approxi
mately
1350
to
1500
Revolutions Per Minute). If it is neces
sary to
adjust
the
idle speed
screw:
1.
FIRMLY
g
ra
s
p the seat mast.
2.
Slowly
turn the idle speed
screw clockwise
until
the
Moped begins to
move
slightly.
3.
Slowly turn t�e screw counterclockwise until the Mo
pe
d
no longer moves.
The
carburetor
is
equipped
with
a
fixed high speed jet.
No
adjustment
is
po
ss
ib
le
or necessary. Alternate high
speed
jets are available from your McCulloch
dealer
which will
provide improved performance at altitudes above
2,000
feet.
Alf
engines lose power
as
altitude
increases.
This is due
to
the "thin"
air
(less oxygen in the atmosphere
at higher
altitudes). The
rate of power
loss
is
approximately
3%
per
1,000
feet
(300
meters) of elevation.
Therefore, an engine
will
develop only 85% of its
sea level
power
at
an altitude of
5,000
feet
(1,500
meters), and only
70%
at
10,000
feet
(3,000
meters).
Other
factors,
such
as
temperature and
humidity, will
affect power output also.
AUTOMATIC
STOP
SWITCH
The
en
gi
ne
is
equipped with an automatic stop switch
that
s
h
u
ts
off the engine when
the
Ii.ft levar
is
placed in
the
rear
position
(lifting
the
engine
and
the
drive roller from contact
with the
wheel). Never
leave
the
engine running while
you
are off and/or away from
the
Moped other than for mainte·
nance reasons.
MAINTENANCE
All engine service, other than that listed here
in
your Owner's
Manual maintenance instructions should
be
performed by a
McCulloch Authorized Service Center, Moped
Engine
dealer.
Contact the AMF Moped dealer from whom you purchased
your Moped for the
names
of M.A.S.C.M.E.'s or
other ser
vicing dealers
in
your area.
SPARK PLUG
For
efficient operation of
the engine,
the
spark plug must
be
kept clean and properly gapped.
WARNING:
If your engine
_
has
just
been
run,
allow all
components to cool.
To dean
or pp
the
plug:
t.
Disconnect the
black rubber
connector
on
the end
of the
wire
from
the
spark plug by twisting
and
pulling at the
same
time.®
2. Remove the spark plug
with
a
1
6m
m
(5/8
inch)
box end
wrench, being certain the wrench
is
completety on the
metal nut portion of the plug.
3.
C
l
e
a
n
minor accumulations of carbon
with
a metal
scraper. Wearing eye protection, blow all particles away.
Should th
e
r
e be excessive
carbon on or around
the
electrodes,
install a
new,
properly gapped spark plug. @
4.
Adjust
the electrode
air
gap to
.025"
by bending
the
side electrode only. @
5.
Using
a
16mm 15/8 inch)
wrench,
securely
install
the
spark plug. Attach the black rubber connector onto
the
plug.
@
AIR FILTER
Never
operate the engine with
the
air filtfi and/or air filter
screen removed, or dust and dirt
will
be sucked into the
engine and damage it. The air
filter
and
air
fitter
screen must
be kept clean. Replace either component if they become
damaged.
To
clean or replace the air filter components:
1. Thoroughly clean the area around the air fitter cover
to prevent
dirt from falling into
the air box.®
2.
Remove the air filter cover, th9
air filter
screen
and
the
ai
r
filter.
@
3.
Thoroughly
wash
the air filter
and air filter
screen
in
liquid detergent and
wattr.
Wrap
tht
air filter in
a clean
dry cloth and squeeze dry. Shake any exam water from
the screen and allow
it
to dry
completely.
4. Saturate the
air filter
with
a light
oil (e.g.
SAE
30),
then squeeze
out
the excm oi
l
.
5.
Proper1y
install
the air filter,
then the
air filter screen.
Snap
the
air
filter cover into
place, being
certain the
cover is completely over
all
the
ridges
on the a
i
r
filter
box.
@
