SPARK PLUGS
Check or replace spark plugs as recommended in the
Periodic Maintenance Schedule
(located in Operator's
Manual). Replace spark plugs that show signs of fouling
or electrode erosion.
.
M73
FIGURE
4.
SPARK
PLUG GAP
BATTERY INSPECTION
Ignition
of
explosive battery gases
l&EEGl
can result in severe personal injury.
Do not
smoke or allow any ignition source near
fhe
ba
ti
ery.
Check battery cells with a hydrometer (Figure
5).
Specific gravity reading should be between
1.260
and
1.290
at
77OF
(25OC).
If
one or more cells are low on water, add distilled water
and recharge. Keep the battery case clean and dry. An
accumulation of moisture
or
dirt will accelerate dis-
charge and battery failure.
GRAVITY READING
SHOULD BE
1.260
at
77OF
(25OC)
Keep the battery terminals clean and tight.
Push
the
cable terminal down flush with or slightly below the top
of
the
battery
post
(Figure
6).After
making
connections,
coat the terminals with a light application
of
petroleum
jelly or grease
to
retard corrosion.
Poor contact at the battery cable connections
is
often a
source
of
trouble. Make sure battery cables are in good
condition
and
that contacting surfaces
are
clean
and
tightly connected.
Do
not reverse battery leads. Use
recommended battery tools when disconnecting leads
to
avoid mechanical battery damage.
BATTERY POST
f
CABLETERMINAL
FIGURE
6.
BATTERY
CABLE
CONNECTION
BATTERY JUMP STARTING
Occasionally, it may be necessary to jump start (charge)
a weak battery using a charged booster battery.
If
jump
starting is necessary, the following procedure is recom-
mended to prevent starter damage, battery damage, and
personal injuries.
1.
Disconnect engine load.
2.
Use a battery
of
the same voltage
(12V)
as is used
with your engine.
3.
Attach one end of the positive booster cable (red) to
the positive
(+)
terminal of the booster battery.
Attach the other end
of
the positive cable to the
positive
(+)
terminal
of
your engine battery.
FIGURE
5.
SPECIFIC
GRAVITY TEST
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