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US-15
HEZ2450S/HEZ3050S
U
S
• Make sure that the engine has
stopped and is cool before
performing any service to the
machine. Contact with moving
cutting head or hot muffler may
result in a personal injury.
■ AIR FILTER
• The air filter, if clogged, will reduce the
engine performance. Check and clean
the filter element. If the element is
broken or clogged, replace with a new
one. (MA1)
(1) air filter
■ FUEL FILTER
• When the engine runs short of fuel
supply, check the fuel cap and the fuel
filter for blockage. (MA2)
(1) fuel filter
■ SPARK PLUG
• Starting failure and mis-firing are often
caused by a fouled spark plug. Clean
the spark plug and check that the plug
gap is in the correct range. For a
replacement plug, use the correct type
specified by RedMax. (MA3)
HEZ2450S: NGK CMR7H
HEZ3050S: NGK CMR7H
• Note that using any spark plug other
than those designated may result in the
engine failing to operate properly or in
the engine becoming overheated and
damaged.
• To install the spark plug, first turn the
plug until it is finger tight, then tighten it
a quarter turn more with a socket
wrench.
TIGHTENING TORQUE:
87~104 in-lbs
(9.8~11.8 N.m.)
IMPORTANT
WARNING
.025 in
0.655mm
MA3
(1)
MA4
9. Maintenance
(1)
MA1
(1)
MA2
■ MUFFLER
• Inspect periodically, the muffler for
loose fasteners, any damage or
corrosion. If any sign of exhaust
leakage is found, stop using the
machine and have it repaired
immediately.
•Note that failing to do so may result
in the engine catching on fire.
■ SPARK ARRESTER
• The muffler is equipped with a spark
arrester to prevent red hot carbon from
flying out of the exhaust outlet.
Periodically inspect and clean as
necessary with a wire brush.
In the State of California it is required
by law (Section 4442 of the California
Public Resources Code) to equip a
spark arrester when a gas powered tool
is used in any forest covered, brush
covered, or grass covered unimproved
land. (MA4)
(1) spark arrester
■ GEAR CASE
• The reduction gears are lubricated by
multipurpose, lithium-based grease in
the gear case. At every 25 hours of
use, supply the gear case with new
grease. (MA5)
• Remove the cutter holders before
installing new grease to arrange for old
grease to exit. (MA6)
• When removing and installing the
holder(A), use care not to allow any dirt
and dust entering in to the gear case.
(MA6)
NOTE
WARNING
MA5