Maintenance – Zenoah BC2603DW User Manual
Page 14
GB-14
AIR FILTER
• The air filter, if clogged, will reduce the engine perfor-
mance. Check and clean the filter element in warm,
soapy water as required. Dry completely before in-
stalling. If the element is broken or shrunk, replace
with a new one.
FUEL FILTER
• When the engine runs short of fuel supply, check the
fuel cap and the fuel filter for blockage.
9. Maintenance
Every Every Every
25
50
100
System/components
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. 22)
if necessary
clean and readjust
GAP: .025 in (0.6 ~ 0.7 mm)
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
cutting parts
✔
something’s wrong
gear case
grease
✔
screws/nuts/bolts
tighten/replace
✔
✔
not adjusting screws
debris guard
make sure to attach
✔
BLADE
• Check the blade and the fasteners for looseness,
cracking, or bending.
• Check the cutting edges and reform with a flat file.
(A) Saw blade
(B) 8-teeth blade
(C) 3-teeth blade
Point :
1. Keep the end corner sharp.
2. Round the root of the edge, using round file.
3. Do not use water when using a grinder.
IMPORTANT
• It is recommended that filing should be done by
professionals.
• Especially regarding filing the saw blade, Leave it to
the professionals.
WARNING
•
Make sure that the engine has stopped and is cool
before performing any service to the machine. Con-
tact with moving cutting head or hot muffler may
result in a personal injury.
9. Maintenance
ENGINE
SHAFT
(1) Fuel filter
(1) Air filter
SPARK PLUG
• Starting failure and misfiring 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 re-
placement plug, use the correct type specified by
KOMATSU ZENOAH.
•
REPLACEMENT PLUG IS A CHAMPION RZ7C.
0.6~0.7 mm