Zenoah BC4310FW User manual

BC4310FW
BRUSHCUTTERS
848JJ393A2 (708)
OWNER’S MANUAL
Caution
•Before using our brushcutter, please
read this manual carefully to understand
the proper use of your unit.
•Keep this manual handy.

2
For safe operation
Contents
For safe operation ...................................2
Set up......................................................3
Fuel .........................................................4
Use .........................................................4
Maintenance............................................6
Storage....................................................7
Disposal ..................................................7
Specifications ..........................................7
EXPLANATION OF PICTORIALS
(1) Read the owner's manual.
(2) Wear helmet, eye and ear protection.
(3) Warning / Attention
(4) Keep all children, bystanders and helpers
15 meters away from the brushcutter.
15. Warn the operator of the danger of blade thrust (Kick back).
Blade thrust may occur when the spinning blade contacts a
solid object in the critical area. A dangerous reaction may
occur causing the entire unit and operator to be thrust
violently. This reaction is called Kick back. As a result, the
operator can lose control of the unit which can cause serious
or fatal injury. Kick back is more likely to occur in areas where
it is difficult to see the material to be cut.
16. When inspecting or servicing the unit, make sure to stop the
engine and disconnect the spark plug as necessary.
17. Cover the blade when transporting or storing the unit. Secure
the unit before storage or transporting to prevent loss of fuel,
damage or injury.
18. When replacing cutting attachment or other components, be
sure to use the parts supplied or recommended by ZENOAH.
19. When the unit is turned off, make sure the cutting attachment
has stopped before the unit is set down.
20. For units equipped with a clutch, be sure the cutting
attachment stops turning when the engine idles.
21. Use only for tasks explained in the instruction handbook.
22. Discard blades that are bent, warped, cracked, broken or
damaged in any way.
23. Instructions on stopping a coasting blade. A blade can injure
while it continues to spin after the engine is stopped or throttle
control is released.
24. Stop the engine and blade before removing material that is
blocking or entangling the cutting attachment.
25. Use a sharp blade. A dull blade is more likely to snag and
thrust. Replace the fastening nut according to the
manufacturer's instruction.
26. Cut only material recommended by the manufacturer. Do not
let the blade contact material it cannot cut, such as rocks,
metal etc.
27. Always wear safety boots, additionally a helmet is required if
there is a risk of contact with falling objects.
1. Read this manual carefully until you completely understand
and can follow all safety notes, precautions, and operating
instructions before using of the unit.
2. Do not operate this tool when you are tired, ill, or under the
influence of alcohol, drugs, or medication.
3. Always wear eye or face protection and hearing protection.
4. Do not wear loose clothing, jewelry, short trousers, sandals, or
go barefoot. Do not wear anything which might be caught by
branches or moving parts of the unit. Secure hair so it is above
shoulder length.
5. Never start or run the engine inside a closed room or building.
Exhaust gases contain dangerous carbon monoxide.
6. Before starting the engine, inspect the entire unit for loose
fasteners and fuel leakage. Make sure that the cutting
attachment is properly installed and securely fastened.
7. Be sure the cutting attachment guard is firmly attached in
place.
8. Fuel is highly flammable. Always keep open flames and sparks
away from the unit and fuel depot. Do not smoke while
refueling the unit or mixing fuel.
9. When refueling the unit, make sure to stop the engine and
allow it to cool down. Wipe spilled fuel completely from the
unit. Move at least 3 meters away from fueling site before
starting the engine.
10. Check the condition of working area to avoid any accident by
hitting hidden obstacles such as stumps, stones, cans, or
broken grass.
11. Keep bystanders and animals at least 15 meters away from
the operating point. If you are approached, immediately stop
the engine.
12. Keep firm footholds and balance at all times. Do not use the
unit where footing is unsteady or slippery.
13. Keep cutting attachment below waist level.
14. Keep all parts of your body away from rotating cutting
attachment and hot surfaces.

Set up
■ENGINE
•Using attached 4 bolts, secure the connection firmly with equal force. (F1)
(1) Bolt
■INSTALLING HANDLE
1. Loosen the 4 bolts on the handle bracket. (F2)
2. Insert the right handle (throttle lever is attached) and the left handle assembly into the
bracket and retighten the bolts securely. (F2)
(1) Handle bracket (2) Right handle (3) Bolt (4) Left handle (5) Engine side
■PROTECTOR
•Wrap the protector around the outer pipe as shown in the figure (F3).
(1) Protector
■SAFETY GUARD
•Attach the safety guard to the gear case and fix it with the clamp and 2 bolts (M5 x 25)
securely. (F4)
(1) Bolt (2) Clamp (3) Main pipe (4) Safety guard
■BLADE
1. Put the angled bar (F5-1) into the side holes of the inner holder (F5-4)and the
gearcase.
2. Remove the blade bolt (F5-2, Lefthanded) and the outer holder (F5-3) from the
gearshaft.
3. Put the blade onto the inner holder.
4. Put the outer holder onto the gearshaft making the recessed side face the blade.
5. Fasten the blade by the blade bolt with the washers (F5-5).
Tightening torque of blade bolt : 15~20 N·m (1.5~2.0 kg·m)
•Detailed attachments and set up method will be shown in separate Thai language
manual.
F1
F2
F3
F5
F4
3

Use
■STARTING THE ENGINE
Take care that the cutting head will start rotating upon the engine starts.
1. Open the fuel tank cock. (F7-1-b)
2. Move the choke lever to the closed position. (F7-2-a)
3. Set the engine switch (F8-1) to the " RUN " position.
4. Place the unit on a flat, firm place. Keep the cutting head clear of everything around it.
5. While holding the unit firmly, pull out the starter rope quickly. (F9)
6. After the engine has started, open the choke gradually and allow the engine to warm
up. Pull the throttle lever to unlock it.
■STOPPING ENGINE
1. Release the throttle lever .
2. Move the engine switch to the “ STOP ” position.
■ADJUSTING THROTTLE CABLE
•The normal play is 1 or 2mm when measured at the carburetor side end. Readjust with
the cable adjuster (F10-1) as required.
■ADJUSTING IDLING SPEED
•It is normal that the engine keeps running without the blade rotation, when the throttle
lever is released. When the engine speed is too high or too slow, readjust the idle set
screw. (F10-2)
WARNING
F7
1
F8
F10
F9
Fuel
•Keep open flames away from the area where fuel is handled or stored.
•Mix and store fuel only in an approved gasoline container.
Mix a regular grade gasoline (leaded or unleaded, alcohol-free) and a quality-proven
motor oil for air cooled 2-cycle gasoline engine use.
WARNING
F6
4
25 : 1 Mix Chart
Gasoline (liters) 12 345
2-cycle oil (ml.) 40 80 120 160 200
Recommended mixing ratio:
Condition Gasoline : Oil
Up to 20 hours use 20 : 1
After 20 hours use 25 : 1
Most engine troubles are caused, directly or indirectly, by the fuel used on the
machine. Take special care not to mix a motor oil for 4-cycle engine use.
NOTE

Cutting work
•By using the shoulder strap, hang the unit on your right side. Adjust the strap length so
that the cutting head may become parallel to the ground. (F11)
■SWIVEL LOCK
a) When the unit is not hung down with the harness, as in transportation, use the swivel
lock to prevent the engine from roll down.
b) To lock the swivel, turn the wing nut (F12-1) clockwise (F12-3).
c) For normal operation, keep the wing nut loose (F12-2).
•Choose a suitable recommended cutting attachment according to the object to be cut.
(F13) Never use other cutting attachment not approved by ZENOAH.
■WHEN USING A METAL BLADE
1. Check the bolt to fasten the blade and be sure the bolt has no fault, and no abrasion.
2. Be sure that the blade and the holder have been fastened according to instruction and
the blade turns smoothly without abnormal noise.
•The rotating parts fastened incorrectly may cause serious accident to the
operator.
■CUTTING METHOD
(a) Use the front left side for cutting.
(b) Guide the blade from your right to left with it tilted slightly to your left. (F14)
(c) When mowing a wide area, start working from your left end to avoid interference of cut
grass.
(d) The blade may be seized by weeds if the engine speed is too low, or the blade cuts too
deep into weeds. Adjust the engine speed and cutting depth according to the condition
of object.
•For your health and to prevent the risk from vibration, refrain from working for a long
time at the cold temperature.
■WHEN USING A NYLON LINE HEAD
1. Guide the head from your left to right to let the cut grass be thrown away from you.
(F15)
2. Always do cutting with the engine running at full throttle.
3. Use only the tip of the line for cutting, and allow it to trim at its own pace.
WARNING
F12
F13
F11
F14
5
F15
Use

0.6 — 0.7mm
F19
F18
F20
Maintenance
Before cleaning, inspecting, or repairing the unit, make sure that the
engine has stopped and is cool.
■BLADE
•Check the blade and the fasteners for looseness, cracking, or bending.
•Check the cutting edges and reform with a flat file.
Point (F16):
1. Keep the end corner sharp.
2. Round the root of the edge.
3. Do not use water when using a grinder.
■AIR CLEANER
•Check and clean the filter element in warm, soapy water as required. Dry completely
before installing. If the element is broken or shrunk, replace with a new one. (F17)
(1) Cover (2) Element (3) Screen (4) Body
A clogged air filter may increase fuel consumption while cutting down the engine power.
And operate the brushcutter without the air filter or with a deformed filter element will
quickly ruin the engine.
■FUEL STRAINER
•Drain a fuel tank to maintain the strainer.
•Disconnect the strainer from fuel pipe and clean sludge from strainer. (F18)
(1) Strainer (2) Fuel tank
A clogged fuel filter may cause poor acceleration of the engine.
■SPARK PLUG
•Starting failure and mis-firing are often caused by a fouled spark plug. Periodically
clean the spark plug and replace with a new one as required. (F19)
•REPLACEMENT PLUG IS A Champion RCJ-6Y.
■GEAR CASE
•Supply ZENOAH genuine grease at every 25 hours of use.
•Remove the cutter holders to arrange for old grease to exit. (F20)
(1) Cutter holder (2) Plug
■MAINTENANCE BEFORE STORAGE
•Old fuel left in the carburetor may cause starting failure. When a series of operation
finished, make sure to empty the fuel tank and drain the carburetor.
•Check all parts and the functions. If the failured or damaged parts have been found,
replace them with new ones.
IMPORTANT
IMPORTANT
IMPORTANT
WARNING
F17
F16
6

Model name...................................................................................................... BC4310FW
Engine model ............................................................................................................. G45L
Displacement ......................................................................................................... 41.5cm3
Carburetor................................................................................................................... Float
Ignition system................................................................... IC controlled flywheel magneto
Spark plug............................................................................................. Champion RCJ-6Y
Fuel...................................................................................... Lubricating oil mixed gasoline
mixing rate 50 : 1 when using ZENOAH genuine oil
mixing rate 25 : 1 when using market oil
Fuel tank capacity ................................................................................................. 0.8 litres
Starter ............................................................................................................ Recoil starter
Clutch......................................................................................................... Centrifugal type
Reduction ratio ............................................................................................ 1.235 (17 : 21)
Cutter rotation ................................................ Counter-clockwise as viewed from operator
Overall dimension L .......................................................................................... 1820mm
W ........................................................................................... 630mm
H ............................................................................................ 480mm
Dry weight .................................................................................................................. 7.2kg
•Specifications are subject to change without notice
Specifications
Storage
Disposal
7
Aged fuel is one of major causes of engine starting failure. Before storing the unit, empty
the fuel tank and run the engine until it uses all the fuel left in the fuel line and the
carburetor. Store the unit indoor taking necessary measures for rust prevention.
When disposing your machine, fuel or oil for the machine, be sure to allow your local
regulations.

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