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US-23
EXZ2450S-PH
U
S
9. Maintenance
■ MAINTENANCE CHART
Maintenance, replacement, or repair of the emission control device and systems may be performed by any
non-road engine repair establishment or individual.
every every every
25 50 100
system/compornent procedure before hours hours hours note
use after after after
fuel leaks, fuel spillage wipe out ✔
fuel tank, air filter, fuel filter inspect/clean ✔✔ replace, if necessary
see ■ADJUSTING replace carburetor
idle adjusting screw ✔
IDLING SPEED (p.16) if necessary
clean and readjust GAP: .025in(0.6~0.7mm)
spark plug ✔
plug gap replace, if necessary
cylinder fins, intake air cooling vent clean ✔
muffler, spark arrester, cylinder exhaust port
clean ✔
throttle lever, ignition switch check operation ✔
replace if BC-EX2, LRT-EX,
cutting parts ✔
something's wrong HE-EX2
debris guard make sure to attach ✔ BC-EX2, HE-EX2
gear case grease ✔
screws/nuts/bolts tighten/replace ✔✔not adjusting screws
oiling port clean ✔ PS-EX only
guide bar clean ✔ PS-EX only
sprocket inspect/replace ✔ PS-EX only
saw chain inspect/sharp ✔ PS-EX only
replace if
sweeper unit ✔ RMS-EX only
something's wrong
ENGINE
SHAFT
• 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
WARNING
■ 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)
• REPLACEMENT PLUG IS A 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
(1)
MA1
(1)
MA2
.025 in
0.655mm
MA3
CUTTING UNIT