EN
WWW.NAKAYAMATOOLS.COM
11
Warning: 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 (Z1)
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.
(1) Air filter
Fuel filter (Z2)
When the engine runs short of fuel supply, check the fuel cap and the fuel filter for blockage.
(1) Fuel filter
Spark plug
Starting failure and misfiring are often caused by a faulty 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 your supplier.
Important: Note that using any spark plug other than those des ignated may result in the engine failing to operate prop erly or In the engine becoming over
-
heated and dam aged.
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: 9.8-11.8 Nm.
Muffler
Warning: 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 cause the engine to catch fire.
Intake air cooling vent (Z4)
Never touch the cylinder, muffler, or spark plugs with your bare hands immediately after stopping the engine. The engine can become very hot when in oper
-
ation, and doing so could result in severe burns.
When checking the machine to make sure that it is okay before using it, check the area around the muffler and remove any wood chips or leaves which have
attached themselves to the brush-cutter. Failing to do so could cause the muffl er to become overheated and that in turn could cause the engine to catch on
fire. Always make sure that the muffler Is clean and free of wood chips, leaves, and other waste before use.
Check the Intake air cooling vent and the area around the cylinder cooling fins after every 25 hours of use for blockage, and remove any waste which has at
-
tached Itself to the machine. Note that It Is necessary to remove the engine cover In order to be able to view the upper part of the cylinder.
Important: If waste gets stuck and causes blockage around the intake air cooling vent or between the cylinder fins, it may cause the engine to overheat, and
that in turn may cause mechanical failure on the part of the machine.
(1) Cylinder
System/components
Procedure
Before
use
Every 25
hours
after
Every 50
hours
after
Every
100
hours
after
Note
Fuel licks, fuel spillage
Wipe out
Fuel tank, air filter, fuel filter
Inspect/clean
Replace if necessary
Idle adjusting screw
See adjusting
idling speed
Replace carburetor if
necessary
Spark plug
Clean and re-adjust
plug gap
GAP: .025 in
(0.6~0.7mm) replace,
if necessary
Cylinder fins, intake air cooling
vent
Clean
Muffler, spark arrester, cylinder
exhaust port
Clean
Throttle trigger, stop switch
Check operation
Cutting parts
Replace if something
is wrong
Transmission
Grease
Screws/nuts/bolts
Tighten/replace
Not adjusting screws
Cutting attachment guard
Make sure to attach
Oiling port
Clean
Guide bar
Clean
Sprocket
Inspect/replace
Saw chain
Inspect/sharp
CUT
TING
UNIT
SHAFT
ENGINE
Maintenance
