1????
ENGLISH
FRANÇAIS
DEUTSCH
ITALIANO
ESPAÑOL
OPERATOR'S MANUAL
MANUEL D'UTILISATION
BEDIENUNGSANLEITUNG
MANUALE PER L'OPERATORE
MANUAL DE INSTRUCCIONES
RM-520ES
WARNING
READ THE INSTRUCTIONS CAREFULLY AND FOLLOW THE RULES FOR
SAFE OPERATION.
FAILURE TO DO SO COULD RESULT IN SERIOUS INJURY.
AVERTISSEMENT
LIRE ATTENTIVEMENT LES INSTRUCTIONS ET SUIVRE LESRÈGLES DE
SECURITÉ.LE NON-RESPECT DES RÈGLES DE SÉCURITÉ ENTRAÎNE UN
ISQUE DE BLESSURE GRAVE.
WARNUNG
LESEN SIE DIE BEDIENUNGSANLEITUNG SORGFÄLTIG DURCH, UND BE
FOLGEN SIE DIE SICHERHEITSREGELN. ANDERNFALLS BESTEHT DAS
RISIKO SCHWERER VERLETZUNGEN.
AVVERTENZA
LEGGERE E SEGUIRE ATTENTAMENTE LE ISTRUZIONI PER LAVORARE IN
CONDIZIONI DI MASSIMA SICUREZZA. LA MANCATA OSSERVANZA DELLE
ISTRUZIONI POTREBBE PROVOCARE LESIONI GRAVI.
ADVERTENCIA
LEA ATENTAMENTE LAS INSTRUCCIONES Y SIGA LAS INDICACIONES
PARA UN FUNCIONAMIENTO SEGURO. DE NO HACERLO, PODRÍA SUFRIR
LESIONES GRAVES.
2
1Cover
ENGLISH
(Original instructions)
OPERATOR'S MANUAL
GRASS-TRIMMER/BRUSHCUTTER
RM-520ES
WARNING
READ THE INSTRUCTIONS CAREFULLY AND FOLLOW THE
RULES FOR SAFE OPERATION.
FAILURE TO DO SO COULD RESULT IN SERIOUS INJURY.
Contents
For safe use of your product...................................... ... .... ... ... ............................................3
Description..........................................................................................................................8
Before you start ..................................................................................................................9
Packing list ....................................................................................................................9
Assembly.....................................................................................................................10
Preparing the fuel ........................................................................................................12
Engine operation...............................................................................................................13
Starting the engine ......................................................................................................13
Stopping the engine..................................................................................................... 14
Trimming operation.......................................... .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... 15
Basic trimming operation with nylon line cutting head.................................................16
Basic trimming operation with metal blade..................................................................18
Maintenance and care......................................................................................................20
Servicing guidelines.....................................................................................................20
Maintenance and care................................................. ... ... ... .... ... ... ... ... .... ... ... ... .... ......20
Storage........................................................................................................................28
Specifications....................................................................................................................29
Declaration of conformity..................................................................................................30
2
For safe use of your product
For safe use of your product
Important information
WARNING
Please ensure that you read the operator's manual before using yo ur product.
About your operator's manual
This manual contains necessary information about the assembly, operation, and maintenance of your product.
Please read it carefully and absorb its contents.
Always keep your manual in a place where it is readily accessible.
If you have lost your manual or it is damaged and no longer readable, please purchase a new one from your dealer.
The units used in this manual are SI units (International System of Units). Figures in parentheses are reference values, and there may be a slight conversion error in some cases.
Failure to do so could lead to an accident or serious injury.
Intended use of this product
This product is lightweight, high-performance, petrol engined unit designed for weed control, grass trimming and
brush cutting in areas difficult to control by any other means.
Do not use this unit for any purpose other than aforementioned.
The content of this manual may be changed without notice for the purpose of upgrades to the product. Some of the
illustrations used may differ from the product itself in order to make the explanations clearer.
Please consult your dealer if anything is unclear or of concern.
Failure to do so could lead to an accident or serious injury.
Do not modify the product
You must not modify the product.
To do so could lead to an accident or serious injury. Any malfunction resulting from a modification to the product will not be
covered by the manufacturer's warranty.
Do not use the product unless it has been checked and maintained
You must not use the product unless it has been checked and maintained. Always ensure that the product is checked
and maintained on a regular basis.
Failure to do so could lead to an accident or serious injury.
Loaning or assigning your product
When loaning your product to another party, ensure that the person borrowing the product receives the operator's
manual along with it.
If you assign your product to another party, please enclose the operator's manual with the product when handing it
over.
Failure to do so could lead to an accident or serious injury.
Users of the product
The product should not be used by:
people who are tired
people who have taken alcohol
people who are on medication
people who are pregnant
people who are in poor physical condition
people who have not read the operator's manua l
children
Keep in mind that the operator or user is responsible for accidents or hazards occurring to other people or their property.
Failure to observe these instructions could lead to an accident.
The ignition system of this product generates electromagnetic fields during operation. Magnetic fields can cause
pacemaker interference or pacemaker failure. To reduce health risks, we recommend that pacemaker users consult
their physician and the pacemaker manufacturer before operating this product.
3
For safe use of your product
WARNING
Vibration and cold
It is believed that a condition called Raynaud's Phenomenon which affects the fingers of certain individuals may be
brought about by exposure to vibration and cold. Exposure to vibration and cold may cause tingling and burn ing,
followed by loss of colour and numbness in the fingers. The following precautions are strongly recom mended because the minimum exposure which might trigge r the ai lment is unknown.
Keep your body warm, especially the head and neck, feet and ankles, and hands and wrists.
Maintain good blood circulation by performin g vigoro us arm exercises during frequent work breaks, and also by
not smoking.
Limit the number of hours of operation. Try to fill each day with jobs where operating the trimmer or other hand-
held power equipment is not required.
If you experience discomfort redness and swelling of the fingers, followed by whitening and loss of feeling, con-
sult your physician before exposing you rself further to cold and vibration.
Failure to observe these instructions could result in damage to your health.
Repetitive stress injuries
It is believed that over-using the muscles and tendons of the fingers, hands, arms and shoulders may cause soreness, swelling, numbness, weakness and extreme pain to the areas just mentioned. Certain repetitive hand activities
may put you at a high risk for developing a repetitive stress injury (RSI). To reduce the risk of RSI, do the following:
Avoid using your wrist in a bent, extended or twisted position.
Take periodic breaks to minimize repetition and rest your hands. Reduce the speed and force in which you do the
repetitive movement.
Do exercises to strengthen hand and arm muscles.
See a doctor if you feel tingling, numbness or pain in your fingers, hands, wrists or arms. The sooner RSI is diag-
nosed, the more likely permanent nerve and muscle damage can be prevented.
Failure to observe these instructions could result in damage to your health.
Proper training
Do not permit operation without proper training and protective equipment.
Be thoroughly familiar with the controls and proper use of unit.
Know how to stop the unit and shut off the engine.
Know how to unhook a harnessed unit quickly.
Never allow anyone to use the unit without proper instruction.
Failure to observe these instructions could result in damage to your health.
Wear proper clothing.
Secure hair so it is above shoulder length.
Do not wear ties, jewellery, or loose, dangling clothing which could be caught in the
unit.
Do not wear open toed footwear, or go bare-foot or barelegged.
Failure to observe these precautions could result in damage to your sight or hearing, or lead
to a serious injury.
Wear protective gear
Always wear the following protective gear when working with the trimmer.
1. Head protection (helmet): Protects the head
2. Ear muffs or ear plugs: Protect the hearing
3. Safety goggles: Protect the eyes
4. Face shield: Protects the face
5. Safety gloves: Protect the hands from cold and vibration
6. Work clothes that fit (long sleeves, long trousers): Protect the body
7. Heavy duty, non-slip protective boots (with toecaps) or non-slip work shoes
(with toecaps): Protect the feet
8. Shin guards: Protect the legs
Failure to observe these precautions could result in damage to your sight or hearing, or
lead to a serious injury.
When necessary, please use the protective gear below.
Dust mask: Protects the breathing apparatus
Bee net: To deal with attacks by bees
4
For safe use of your product
WARNING
Environment of use and operation
Do not use the product:
under poor weather conditions.
on steep slopes or in places which give no secure foothold and are thus slippery.
at night or in dark places with poor visibility.
When using the product on a gentle slope, work in a level, contour-like motion.
A serious injury could result if you fall or slip, or fail to operate the product correctly.
For your own health and your safe and comfortable work, operate the machine within the air temperature range of
í5oC to 40oC.
Failure to observe these instructions could result in damage to your health.
Being prepared in case of an injury
In the unlikely event of an accident or injury, please ensure that you are
prepared.
First aid kit
Towels and wipes (to stop any bleeding)
Whistle or mobile phone (for calling outside help)
If you are unable to perform first aid or call for outside help, the injury could
worsen.
Put safety first in the case of fire or smoke
If fire comes from the engine or smoke appears from any area other than the exhaust vent, first distance
yourself from the product to ensure your physical safety.
Use a shovel to throw sand or other such material on the fire to prevent it from spreading, or put it out
with a fire extinguisher.
A panicked reaction could result in the fire and other damage becoming more extensive.
Warning notices
DANGER WARNING CAUTION
This symbol accompanied by the
word "DANGER" calls attentions to
an act or a condition which will lead to
serious personal injury or death of operators and bystanders.
Other indicators
Circle and slash symbol means whatever is
shown is prohibited.
Symbols
Symbol form/shape Symbol description/applica-
This symbol accompanied by the
word "WARNING" calls attentions to
an act or a condition which can lead to
serious personal injury or death of operators and bystanders.
This enclosed message provides tips
for use, care and maintenance of the
product.
tion
"CAUTION" indicates a potentially
hazardous situation which, if not
avoided, may result in minor or moderate injury.
NOTE IMPORTANT
Framed text featuring the word "IMPORTANT" contains important infor-
mation about the use, checking,
maintenance and storage of the product described in this manual.
Symbol form/shape Symbol description/applica-
tion
Carefully read the operator's
manual
Wear eyes, ears and head
protection
The maximum speed of the
cutting attachment shaft in
r/min
Keep bystanders away 15 m
5
For safe use of your product
Symbol form/shape Symbol description/applica-
tion
Wear foot protection and
gloves
Emergency stop
Warning!
Thrown objects!
Warning, side thrust
Usage without shield not permitted
Symbol form/shape Symbol description/applica-
tion
Petrol and oil mixture
Choke Control "Cold Start"
Position (Choke Closed)
Choke Control "Run" Position
(Choke Open)
Carburettor adjustment
- Idle speed
Lubricate in every 18 hours
Usage of metal blades not
permitted
Usage of nylon line cutting
head not permitted
Do not use the product in places with poor ventilation
Beware of fire Engine start
Beware of electric shocks
-
Loop handle
Beware of high-temperature
areas
Guaranteed sound power level
6
For safe use of your product
Safety decal(s)
The safety decal shown below has been attached to the products described in this manual. Ensure that you understand what
the decal means before using your product.
If the decal becomes unreadable due to wear and tear or damage, or peels off and is lost, please purchase a replacement decal
from your dealer and attach it in the location shown in the illustrations below. Ensure that the decal is readable at all times.
1. Safety decal (Part number 890617-43130)
7
Description
Description
1. Cutting attachment - Nylon line cutting head for cutting
grass and weed.
2. Shield - Device to protect the operator from accidental
contact with the cutting head and thrown objects.
3. Angle transmission - Having two gears to change to
angle of rotating axis.
4. Shaft tube - Part of the unit that provides a casing for
power transmission shaft.
5. Front handle - Handle located towards the cutting device.
6. Ignition switch - "Slide switch" mounted on top of the
throttle trigger housing, move switch upward to RUN,
downward to STOP position.
7. Throttle trigger - Activated by the operator's finger for
controlling the engine speed.
8. Throttle trigger lockout - Locks throttle trigger in the
idling position until you have a proper grip with your right
hand around the handle.
9. Rear handle - Handle located towards the knapsack
power unit.
10. Flexible shaft assembly - Flexible tube for the power
transmission shaft.
11. Tool bag - Removable bag for tool and accessories.
12. Silencer cover - Cover the silencer not to make operator touch to hot surface of silencer.
13. Spark plug
14. Starter handle - Pull handle to start the engine.
15. Fuel tank - Contains fuel and fuel filter.
16. Air cleaner cover - Covers air filter.
17. Fuel tank cap - For closing the fuel tank.
8
Before you start
Packing list
The following parts are packed separately in the packing box.
When you have unpacked the box, please check the parts that it contains.
Contact your dealer if anything is missing or broken.
Engine
Before you start
Operation Shaft
1. Engine
2. Throttle trigger
3. Locking tool
4. Socket wrench
5. L-wrench
6. Safety goggles
7. Caution tag
8. Plastic cap
9. Front handle
10. Nylon line cutting head
11. Strap
12. Operator's manual
13. Shield (for nylon line cutting head)
14. Shield (for metal blade)
15. Flexible shaft assembly
16. Shaft tube
9
Before you start
Assembly
WARNING
Read the operator's manual carefully to ensure that you assemble the product correctly.
Using a product that has been incorrectly assembled could lead to an accident or serious injury.
Operation shaft assembly
1. Loosen the bolt (A).
2. Remove the lock bolt (B).
3. Insert the flexible shaft assembly (C) into the angle transmission.
4. Align the hole of the flexible shaft assembly (D) with the hole
of the angle transmission (E).
5. Tighten the lock bolt and bolt.
6. Remove the lock bolt (F).
7. Insert the flexible shaft assembly (G) into the trigger tube.
8. Tighten the lock bolt.
9. Loosen the clamping knob (I).
10. Pull locator pin (J) out, and turn anticlockwise 1/4 turn to
lockout position.
11. Insert the operation shaft assembly (K) into the coupler (L)
as aligning the socket (M) with the flexible shaft (N).
12. Rotate locator pin 1/4 turn clockwise to engage operation
shaft hole. Insure locator pin is fully engaged by twisting operation shaft. Locator pin should snap flush in coupler. Full
engagement will prevent further shaft rotation.
13. Tighten the lock bolt.
14. The two pieces of clip attached to flexible shaft assembly
must be set to appropriate positions on the throttle cable (at
equal distance on the whole length of the flexible shaft assembly).
NOTE
To disassemble, reverse assembly instructions. Insert the
plastic cap to the coupler in order to prevent grease leakage
10
Loop handle assembly
Shoulder harness
Before you start
1. Assemble the front handle (A) and bracket (B) on the shaft
tube (C) loosely.
2. Adjust the location of the front handle to a convenient position.
3. Tighten the screws (M5×35) (D) and nuts (E) securely. - One
of the 4 screws must be tighten together with the hanger (F)
as illustrated.
1. Suit the length of knapsack band to comfort.
2. As the strap is elastic and adjustable, it is preferable to connect the strap (A) to the hangers (B) located on the front handle (C) and the left or right knapsack band to maintain a
fatigueless and comfortable operation.
1. Front handle
2. Hanger
3. Strap
Installation of shield
Installing nylon line cutting head
1. Fit shield (A) to mounting portion of angle transmission and
tighten 4 bolts (B).
CAUTION
Fix output shaft securely using locking tool in order to
prevent it form rotating when nylon cutting head is
mounted.
1. Insert locking tool into a hole located on the right side of angle transmission while forcing retainer spring to the left side.
2. Insert locking tool further into blade retainer fixing slot (A) to
fix output shaft.
3. Thread nylon line cutting head (B) onto shaft (anticlockwise)
until it is tight.
4. Remove locking tool (C).
11
Before you start
Preparing the fuel
DANGER
Do not fuel up while the engine is hot or in operation.
Do not smoke or hold a flame near when refuelling.
If you do so, the fuel could ignite and cause fire, leading to burns.
WARNING
Do not fill fuel tanks indoors. Always fill fuel tanks outdoors over bare ground. Do not refuel the product on the loading platform of a truck, or in other such places.
Fuel tanks/cans may be under pressure. Always loosen fuel caps slowly allowing pressure to equalize.
Otherwise, fuel may get spewed.
Mop up any fuel that overflows or spills out due to overfilling.
Fuel spills can cause fire and burns when ignited.
After refuelling, always check that there are no leaks or discharges of fuel from the fuel pipe, fuel system grommets,
or around the fuel tank cap. If you do find fuel leaks or discharges, stop using the product immediately and contact
your dealer to have it repaired.
Any fuel leaks could cause fire.
Keep the refuelling tank in a shaded area away from fire.
Use an approved fuel container.
IMPORTANT
Fuel is a mixture of regular grade petrol and an air-cooled 2-stroke engine oil of reputable brand name. Minimum 89 Octane
unleaded petrol is recommended. Do not use fuel containing methyl alcohol or more than 10 % of ethyl alcohol.
Stored fuel ages. Do not mix more fuel than you expect to use in thirty (30) days.
Fuel
Recommended mixture ratio; 50: 1 (2%) for ISO-L-EGD
Standard (ISO/CD 13738), JASO FC,FD grade and ECHO
Premium 50: 1 oil.
Do not mix directly in engine fuel tank.
Fuel supply
Do not add so much fuel that it reaches the mouth of the fuel
tank (A). Keep the fuel within the prescribed level (up to the
shoulder level (B) of the fuel tank).
Tighten the fuel tank cap securely after refuelling.
12
Engine operation
Engine operation
Starting the engine
WARNING
Be particularly careful to observe the following precautions when starting the engine:
Move at least 3m from the place where you refueled.
Place the product in a flat, well ventilated place.
Check that there are no fuel leaks.
Inspect metal blades for cracks.
Check that none of the nuts and bolts are loose.
Leave plenty of space around the product and do not allow people or animals near it.
Start the engine with the throttle trigger in the idle speed position.
Hold the product firmly to the ground when starting the engine.
Failure to observe the precautions could cause an accident or injury, or even lead to a fatality.
Check that there are no abnormal vibrations or sounds once the engine starts. Do not use the product if there are
abnormal vibrations or sounds. Contact your dealer to have it repaired.
Accidents involving parts that fall or shatter off can cause wounds or serious injury.
The exhaust fumes from the engine contain toxic gases. Do not operate the product indoors or in other
ill ventilated places.
The exhaust fumes could cause poisoning.
Do not touch silencer, spark plug, angle transmission, and other high temperature components while
the product is running or for some time after it stops.
You could burn yourself if you touch a high temperature component.
Do not touch spark plug, spark plug wire, and other high voltage components w hile the product is running.
You could receive an electric shock if you touch a high voltage component while the product is running.
If the cutting attachment rotates even though the throttle trigger is in the idle speed position when the engine is started, adjust the carburettor before using the product.
Failure to observe the precautions could cause an accident or injury, or even lead to a fatality.
NOTE
Pull out the starter grip gently at first, and then more rapidly. Do not pull the starter rope out to more than 2/3 of its length.
Do not let go of the starter grip as it returns.
Starting a cold engine
(Connect the spark plug cap if the product has been in storage for
a long period of time.)
1. Remove the blade cover.
2. Placing the product on level ground, check to ensure that the
cutting attachment does not come into contact with the surface of the ground or any other impediment using a beam or
other such implement.
3. Move the ignition switch (A) to the Start position.
4. Make sure that the throttle trigger (D) is at the idle speed position.
13
Engine operation
5. Move the choke lever (F) to the "Cold Start" (E) position.
6. Alternately press and release the purge bulb (H) until the fuel
is sucked up into it.
7. Checking that the area around you is safe, hold the position
closest to the engine firmly as shown in the illustration, pulling several times on the starter grip (I).
8. If you hear an explosion-like sound and the engine stops immediately, move the choke lever to the "Run" (G) position
and continue pulling on the starter grip to start the engine.
9. If the engine does not stop, return the choke lever gently to
the "Run" position.
10. Leave the engine to warm up at idle speed for a while.
Starting a warm engine
Stopping the engine
1. Move the ignition switch (A) to the Start position.
2. Make sure that the throttle trigger (D) is at the idle speed position.
3. Check that the choke lever is in the "Run" position.
4. If no fuel is visible in the purge bulb, alternately press and release the purge bulb until the fuel is sucked up into it.
5. Checking that the area around you is safe, hold the position
closest to the engine firmly, and pull on the starter grip to
start the engine.
1. Move the throttle trigger (B) to the idle speed position and set
the engine to idling (i.e. low speed).
2. Move the ignition switch (A) to the Stop position.
3. In the event of an emergency, stop the engine immediately
using the ignition switch.
4. If the engine fails to stop, move the choke lever to the "Cold
Start" position. The engine will stall and come to a halt (an
emergency stop).
If the engine fails to stop when the ignition switch is used, have
the ignition switch checked and repaired by your dealer before
you use the product again.
5. Always disconnect the spark plug wire from the spark plug to
ensure the engine cannot be started before you work on the
unit or leave it unattended.
14
Trimming operation
Trimming operation
DANGER
Always stop the engine when a cutting attachment jam occurs.
Severe injury can occur if a jam is removed and the cutting attachment suddenly starts.
Do not operate the product without the shield in place.
Any objects that ricochet off the cutting attachment could cause an accident or serious injury.
The area within a 15 m radius of the product is a danger zone. Be careful to observe the following precautions while working with the product.
Do not allow children and other people or pets to enter the danger
zone.
If another person enters the danger zone, turn off the engine to stop
the cutting attachment from rotating.
When approaching the operator, signal to him by, for example,
throwing twigs from outside the danger zone, and then check that
engine has been switched off and the cutting attachment has
stopped turning.
If more than one person is working with the product, identify the way
in which you will signal to each other and work at least 15 m apart.
Any objects that ricochet off the cutting attachment, and any contact with the cutting attachment, could cause blindness or a
fatal accident.
WARNING
Before starting work, check the area where you will be working and remove any small stones
and empty cans likely to ricochet off the cutting attachment, as well as any pieces of string
or wire that might become twisted around the cutting attachment.
An accident or serious injury can occur if foreign objects ricochet off the cutting attachment or wire
and other materials twisted round the product spring off it.
In the following situations, turn off the engine immediately and ensure that the cutting attachments have stopped
before checking each area of the product. Replace any damaged parts.
If the cutting attachment hits a rock, tree, post, or other such obstruction while you work.
If the product suddenly starts to vibrate abnormally.
Continuing to use parts when they are damaged could lead to an accident or serious injury.
Do not hold the cutting attachment up while you work. You must not work with the cutting attachments raised above
knee level.
Raising the cutting attachment above knee level brings the plane of rotation closer to the face, and any objects that fly off the
cutting attachments could cause an accident or serious injury.
Transport of the product
When transporting in the situations described below, turn off the engine and ensure that the trimmer blade has
stopped rotating, then fit the trimmer blade cover and position the silencer away from yourself.
Moving to the place where you are working.
Moving to another area while you are working.
Leaving the place where you have been working.
Failure to observe these precautions could cause burns or serious injury.
When transporting the product by car, empty the fuel tank, fit the blade cover, and secure the product firmly in place
to prevent it from moving around.
Travelling by car with fuel in the fuel tank could lead to a fire.
Never attempt to operate the product with one hand.
Ensure that you hook your thumbs around the grips, wrapping them in your
thumb and remaining fingers.
15
Trimming operation
1. Hold the rear handle of shaft tube in left hand and hang the
right knapsack band on the right shoulder.
2. Hold the rear handle of shaft tube in right hand and hang the
left knapsack band on the left shoulder.
3. For even load on both sides of shoulder, joggle the unit on
the shoulder a couple of times.
4. It is preferable to connect the strap to the hangers located on
the loop handle the left or right knapsack band and adjust the
length of the strap to maintain a comfortable operation.
Increase engine speed as necessary, heavy weeds will require
more power than cutting grass.
Hold the front handle (loop handle) and rear handle both hands.
When cutting weeds or grass, swing the blade right and left in
an arc as you move forward.
The blade rotates anticlockwise, so it is necessary to cut the
object from the right to the left.
The manner of walking is as follows: - Place the right foot in
front of the left foot without fail. - Step the right foot forward
firstly and secure your footing. - And then follow the left foot to
the behind of the right foot.
Basic trimming operation with nylon line cutting head
WARNING
Serious injury may result from the improper use of cutti ng attachment. Read and comply with all safety instructions
listed in this manual.
Use only cutting attachments recommended by YAMABIKO CORPORATION.
Excessive nylon line beyond cut off knife could fly off when the nylon line cutting head starts rotating after adjustment of nylon line length.
Failure to do so could lead to an accident or serious injury.
Adjusting nylon line
Do not rotate the nylon line cutting head at more than 10000 r/
min.
When releasing nylon line from spool, hit tap knob of spool
against the ground surface lightly at rotation speed lower than
4500 r/min.
Cut off knife on the shield adjusts cutting swath automatically
by cutting nylon lines evenly when attachment starts rotating.
When operating with less than maximum cutting swath, cut
two nylon lines in equal lengths.
1. Tap knob
2. Hit knob against the ground surface lightly
3. Nylon line comes out
16
Trimming
Scything
Trimming operation
This is feeding the trimmer carefully into the material you wish
to cut. Tilt the head slightly to direct the debris away from you.
If cutting up to a barrier such as a fence, wall or tree, approach
from an angle where any debris ricocheting off the barrier will
fly away from you.
Move the nylon line cutting head slowly until the grass is cut
right up to the barrier, but do not jam (overfeed) the line into
the barrier. If trimming up wire mesh or chain link fencing, be
careful to feed only up to the wire. If you go too far, the line will
snap off around the wire.
Trimming can be done to cut through weed stems one at a
time. Place the nylon line cutting head near the bottom of the
weed never high up, which could cause the weed to chatter
and catch the line. Rather than cut the weed right through, just
use the very end of the line to wear through the stem slowly.
1. Angle to wall
2. Debris
3. Knife side raised
4. Angle to ground
This is the cutting or mowing of large grassy areas by sweep-
ing or swinging the trimmer in a level arc. Use a smooth, easy
motion. Do not try to hack or chop down the grass. Tilt the nylon line cutting head to direct the debris away from you on the
scything stroke. Then return without cutting grass for another
stroke. If you are well protected and do not care whether some
debris is thrown in your direction, you may scythe in both directions.
Scalping and edging
Both of these are done with the nylon line cutting head tilted at
a steep angle. Scalping (A) is removing top growth, leaving the
earth bare. Edging (B) is trimming the grass back where it has
spread over a pavement or driveway. During both edging and
scalping, hold the unit at a steep angle in a position where the
debris, and any dislodged dirt and stone, will not come back
towards you even if it ricochets off the hard surface.
Although the pictures show how to edge and scalp, every op-
erator must find for himself the angles which suit his body size
and cutting situation.
For nearly all cutting, it is good to tilt the nylon line cutting head
so that contact is made on the part of line circle where the line
is moving away from you and the shield (See appropriate picture). This results in the debris being thrown away from you.
Tilting the head to the wrong side will shoot the debris toward
you. If the nylon line cutting head is held flat to the ground so
that cutting occurs on the whole line circle, debris will be
thrown at you, drag will slow the engine, and you will use up a
lot of line.
Nylon line cutting head rotates anticlockwise. The knife will be
on the left side of the shield.
1. Debris
2. Cut on this side
17
Trimming operation
Basic trimming operation with metal blade
Do not push the line into tough weeds, trees, or wire fences.
Pushing the line into chicken wire, chain link fencing or thick
brush can result in snapped-off line ends being hurled back at
the operator. The proper way is to cut right up to a barrier, such
as any of those mentioned, but never run the line into or
through the obstruction. Do not cut closely to obstruction or
barrier.
Avoid nylon line contact with broken wire fencing. Pieces of
wire broken off by the trimmer can be hurled at high speeds.
WARNING
Please observe the following instructions when trimming.
Check to ensure that the trimmer blade has been tightened securely in place.
Replace the shield if it is damaged or cracked.
Replace the trimmer blade nut when it becomes worn.
Do not cut into the ground with the blade.
Do not operate with a dull, bent, fractured or discoloured blade and worn or damaged nut.
Do not run engine at full throttle without a load.
Failure to do so could lead to an accident or serious injury.
Use only cutting attachments recommended by YAMABIKO CORPORATION.
The type of blade used must be matched to the type and size of material cut. An improper or dull blade can cause
serious personal injury. Blades must be sharp. Dull blades increase the chance of kick-out and injury to yourself and
bystanders.
Plastic/Nylon Grass/Weed Blades may be used where ever the nylon line head is used. Do not use this blade for
heavy weeds or brush.
The 3 cutter blade is designed especially to cut weeds and grass. To avoid injury due to kickback or blade fracture,
do not use the 3 cutter blade to cut brush or trees.
8 Tooth Weed/Grass Blade is designed for grass, garden debris and thick weeds. Do not use this blade for brush
or heavy woody growth, 19 mm diameter or larger.
22 Tooth Clearing Blade is designed for dense thickets and saplings up to 64 mm diameter.
80 Tooth Brush Blade is designed for cutting brush and woody growth up to 13 mm diameter.
Damaged or shattered blades can cause accidents and serious injury.
Kickback
The phenomenon that occurs if the trimmer blade comes into
contact with a tree, post, rock or other hard object while rotating at high speed and reacts by recoiling powerfully and
instantaneously is known as kickback.
Causing kickback can result in a loss of control over the
product and is highly dangerous.
In particular, if the front-right quadrant of the trimmer blade
(B) strikes a shrub or other such object, the trimmer blade
will cause the product to recoil sharply backwards to the
right.
To prevent kickback, do not trim from left to right. Be careful to ensure that the trimmer blade does not strike any
hard objects.
When trimming, ensure that the object you are cutting meets the portion of the blade 1/3 in from the front edge on
the left-hand side (A).
Failure to do so could cause an injury or fatal accident.
18
Scything weeds
Trimming operation
This is cutting by swinging the cutting attachment in a level
arc. It can quickly clear areas of field grass and weeds. Scything should not be used to cut large, tough weeds or woody
growths.
If a sapling or shrub binds the cutting attachment, do not use
the cutting attachment as a lever to free the bind, because this
will cause cutting attachment failure.
Instead, shut off the engine and push the sapling or shrub to
free the blades.
19
Maintenance and care
Maintenance and care
WARNING
Observe the following precautions when checking and maintaining your product after use:
Turn the engine off and do not attempt to check or maintain the product until the engine has cooled.
You could burn yourself.
Remove the spark plug cap before performing checks and main tenance.
An accident could occur if the product starts unexpectedly.
IMPORTANT
Checking and maintenance requires specialist knowledge. If you are unable to check and maintain the product or deal with a
fault yourself, consult your dealer. Do not attempt to dismantle the product.
Servicing guidelines
Area Maintenance Page Before use Monthly
Air filter Clean/Replace 20 •
Fuel filter Inspect/Clean/Replace 21 •
Spark plug Inspect/Clean/Adjust/Replace 22 •
Carburettor Adjust/Replace and adjust 21 •
Cooling system Inspect/Clean 21 •
Silencer Inspect/Tighten 22 •
Silencer Clean 22 •***
Flexible shaft Grease 22 •*
Angle transmission Grease 23 •**
Starter Inspect - •
Cut off knife Inspect/Clean - •
Fuel system Inspect 21 •
Screws, bolts and nuts Inspect, Tighten/Replace - •
* Or 18 hours, whichever occurs first. ** Or 50 hours, whichever occurs first. *** Or 100 hours, whichever occurs first.
IMPORTANT
Time intervals are maximum. Actual use and your experience will determine the frequency of required maintenance.
Maintenance and care
If you have any questions or problems, please contact your dealer.
Cleaning air filter
1. Close choke. Loosen screw and remove air cleaner cover
(A).
2. Remove air filter (B) (air filter is located inside air cleaner
cover).
3. Brush dirt from filter or clean with compressed air.
4. Reinstall filter.
5. Reinstall cover and tighten screw.
20
Maintenance and care
Replacing fuel filter
1. Use a piece of metal wire or the like to pick up fuel filter (A)
through fuel tank opening.
2. Pull old filter from fuel line (B).
3. Install new fuel filter.
NOTE
If filter is excessive dirty or no longer fits properly, replace it.
Carburettor adjustment
WARNING
YOU MAY ADJUST THE IDLE SPEED ONLY by turning the idle speed adjustment screw (T).
During carburettor adjustment, the cutting attachment may move. Pay utmost attention and care to the cutting attachment so as not to get injured by the moving cutter.
When carburettor adjustment is completed, the cutting attachment should not move at idle speed, otherwise serious
personal injury may result.
You must NOT carry out any Carburettor adjustment, other than the idle speed. All other adjustments MUST be performed by an authorized service dea ler, or serious personal injury may re sult due to malfunction of the engine.
CAUTION
When there is trouble with the carburettor, contact an authorized service dealer.
Every unit is test run at the factory and the carburettor is fine
tuned for maximum performance.
Before adjusting carburettor, clean or replace air filter, start engine and run several minutes to bring it to operating temperature.
To adjust the carburettor proceed as follow:
Turn "idle" speed adjustment screw (T) clockwise until cutting
attachment begins to turn, then turn screw(T) out anticlockwise until cutting attachment stops turning. Turn screw (T) out,
anticlockwise, and additional 1 turn.
NOTE
When the carburettor cannot be adjusted properly with the idle
speed adjustment screw (T), you must contact an authorized
service dealer.
Cooling system maintenance
IMPORTANT
To maintain proper engine operating temperature, cooling air must pass freely through the cylinder fin area. This
flow of air carries combustion heat away from the engine. Overheating and engine seizure can occur when:
Air intakes are blocked, preventing cooling air from reaching the cylinder,
Dust and grass build up on the outside of the cylinder. This build-up insulates the engine and prevents the heat
from leaving.
Removal of cooling passage blockages or cleaning of cylinder fins is considered "Normal Maintenance". Any resultant failure
attributed to lack of maintenance is not warranted.
21
Maintenance and care
Air intake
Cleaning silencer
Keep dirt away from engine and air intake grid.
Carbon deposits in silencer (A) will cause a drop in engine out-
put and overheating. Clean deposits from silencer.
IMPORTANT
Do not remove the silencer cover. If necessary, Please consult
your dealer.
Check fuel system
Check spark plug
DPP
Lubricating flexible shaft
Check before every use.
After refuelling, make sure fuel does not leak or exude from
around fuel pipe (A), fuel grommet (B) or fuel tank cap (C).
In case of fuel leakage or exudation, there is a danger of fire.
Stop using the machine immediately and request your dealer
to inspect or replace.
1. Check plug gap. Correct gap is 0.6 mm to 0.7 mm.
2. Inspect electrode for wear.
3. Inspect insulator for oil or other deposits.
4. If the electrodes or terminals are worn, or if there are cracks
in the ceramics, replace them with new parts.
5. Tighten to 15 N·m - 17 N·m (150kgf·cm to 170 kgf·cm).
The spark test (for checking whether the spark plug is spark-
ing) must be carried out by your dealer.
All the surface of the flexible shaft should always be properly
greased.
At the time of delivery from the pl ant, this is greased, so evenly
grease all the surface of the flexible shaft approximately 10 mL
in every 18 hours.
1. Draw out the flexible shaft assembly from the angle transmission.
22
Angle transmission
Maintenance and care
2. Draw out the flexible shaft from the flexible shaft assembly.
3. Use the same grease as the angle transmission's.
4. When reassemble, it is preferable to fit the flexible shaft reversely, and the stopper (A) must be fitted on the angle
transmission side of the flexible shaft.
1. Remove the plug (A) and drain screw (B) from the angle
transmission (C).
2. Add grease into the transmission until old grease is pushed
out. If necessary, use a low pressure pump.
3. Reinstall the drain screw and plug.
1. Remove the plug (A) from the angle transmission (C).
2. Add grease, if necessary, use a low pressure pump.
Method to change shield
Installing blade (option)
IMPORTANT
Use the genuine grease from YAMABIKO CORPORATION
(Part number: X695-000010).
3. Reinstall the plug.
There are two types of shields: namely the one used exclu-
sively for nylon line cutting head and the other one used exclusively for metal blade. When metal blade is used, use the
shield for metal blade.
1. Fully loosen the bolt (A) on the right side of the bracket (B)
to slide the shield. The bolt itself cannot be removed from the
bracket.
2. Pushing the button (C), slide the shield (D) to the left and remove it.
3. Put shield of other type (E) into groove and slide it to the right
until it stops. Be sure to tighten the bolt.
WARNING
Wear heavy duty gloves when working with the trimmer blade.
When replacing the trimmer blade during a trimming task, ensure that the engine is switched off and that the blades
have stopped.
When turning the product over to replace the trimmer blade, ensure that the fuel tank cap is securely in place.
Do not attempt to fit the trimmer blade with one hand or without using the socket spanner. Fit the trimmer blade accurately using the supplied socket spanner and tighten firmly in position.
Do not use any tools other than the provided socket spanner to tighten the blade; a pneumatic or electric tool may
tighten the blade more than necessary and cause the nut or the output shaft to break.
If worn nut and cup for blade are used, there is a danger of blade getting loose. Replace them with new one.
Failure to do so could lead to an injury or serious accident, or cause a fire.
23
Maintenance and care
1. Inspect blades (C) before installation. Check for sharpness.
Dull blades increase the risk of blade kickback reactions.Small cracks can develop into fractures resulting in a
piece of blade flying off during operation. Discard cracked
blades no matter how small the crack.
2. Securely tighten the blade retainer (B), blade, lower blade
retainer (D), cup (E), and nut (F) by hand.
3. Insert locking tool (G) into a hole located on the right side of
angle transmission while forcing retainer spring to the left
side.
4. Insert locking tool further into blade retainer fixing slot (A) to
fix output shaft.
CAUTION
Fix output shaft securely using locking tool in order to
prevent it form rotating when blade is mounted. Otherwise, the blade fastening nut will not be tightened sufficiently.
Checking the blade
5. Tighten the nut (turn anticlockwise) using a socket wrench
(H). Never fasten while applying your weight. Otherwise the
thread of nut could be broken.
Use only blade designated for this model by the manufacturer.
When a crack is noticed on the blade, do not use it but replace
with a new one.
Ensure that the blade is correctly fitted in accordance with the
instructions.
When the cutting blade becomes dull due to wear reverse it for
further use.
When chip or bend occurs on the blade, vibration will increase.
Replace with new one.
When filing the blade file 3 cutting edges evenly using a flat file
as shown in the illustration. Otherwise, the balance will be lost
and vibration will increase.
24
Checking the nylon line cutting head
Maintenance and care
1. Make sure each periphery of the 2 retaining pawls of housing
spreads almost fully up to the outer periphery of the respective cover window.
2. Check mount of cutting head on trimmer and tighten if it is
loose.
3. Check the cutter head for deflection or abnormal noise rotating it by hand. Deflection or abnormal noise can cause abnormal vibration to occur or mount to trimmer to loosen
during rotation which is dangerous.
4. Inspect cover and tap knob for wear. When slot appears on
bottom of the tap knob or when slot appears on cover bottom
close to outlet for nylon line, replace them with new parts
without fail.
5. Check the cutting head for crack or chip. Replace parts that
show any crack or chip with new ones without fail.
Replacing nylon line
DANGER
Shut down trimmer engine without fail and make sure nylon line cutting head has stopped rotating before starting
replacement procedure.
To do so could lead to an accident or serious injury.
WARNING
Use only flexible, non-metallic line recommended by YAMABIKO CORPORATION.
Failure to do so could lead to an accident or serious injury.
1. Press "retaining pawls" (at two places) inward and remove
cover. It is easier to remove one after another.
2. Remove spool.
3. When nylon line on the spool is almost exhausted, remove
remaining line from spool and wind "new line" according to
the procedures (4) and beyond. When the line on the spool
is "melted and stuck" remove the entire line while peeling off
the "melted and stuck" portion and wind the "removed line"
anew according to procedures (4) and beyond.
4. Bend the line at the point 12 cm away from the middle of
whole length and hook the bent portion into the "notch" of the
intermediate separator.
5. Wind the line firmly into groove of the spool following "winding direction for the arrow".
25
Maintenance and care
6. When the line is wound to the end hook both line ends into
respective notch of spool for retaining tentatively the line
while leaving line ends approximately 10 cm beyond notch.
7. Align notches of spool for the line with grooves of eyelets
and fit spool into cover.
8. Pull out the line from cover. (A) Remove the line from "respective notch of spool", and (B) pass it through "groove of
respective eyelet".
9. Fit cover and housing together. (C) Align "eyelets" of cover
with "recesses" of housing, and (D) press pawls of housing
into respective window of cover until the pawls are firmly fitted into the windows.
DANGER
Make sure each outer periphery of pawls of housing
spreads almost fully up to the outer periphery of respective window of cover. If they are loosely fitted and the cutting head is turned, cover or inside components can fly off
which is dangerous.
26
Maintenance and care
Troubleshooting table
IMPORTANT
For spare parts and consu mables, please use only genuine parts and designated products and components.
Using parts from other manufacturers or non-designated components may result in a malfunction.
Problem Diagnosis Cause Solution
The engine does
not start
Engine is difficult to
start, fluctuating rotation
Engine starts but
no acceleration is
possible
The engine stops 1. Carburettor adjustment problem
The engine fails to
stop
Cutting attachment
rotates when the
engine is idling
Fuel is entering the overflow
pipe
No fuel is entering the overflow pipe
The spark plug is dirty or
damp
1. There is no fuel in the fuel tank
2. The stop switch is in the Stop position
3. Excess fuel suction
4. Electrical fault
5. Carburettor malfunction or internal sticking
6. Internal engine malfunction
1. Fuel degradation
2. Carburettor problem
1. Fuel filter is clogged
2. Fuel system is clogged
3. Internal carburettor parts sticking
1. Fuel degradation
2. Incorrect electrode gap
3. Carbon deposits
4. Electrical fault
1. Dirty air filter
2. Dirty fuel filter
3. Blocked fuel passage
4. Carburettor adjustment problem
5. Blocked exhaust vent or silencer vent
2. Electrical fault
1. Stop switch malfunction 1. Perform an emergen-
1. Carburettor adjustment problem
2. Damaged clutch spring
1. Fuel supply
2. Move to the Start position
3. Start the engine after
servicing
4. Consult your dealer
5. Consult your dealer
6. Consult your dealer
1. Replace with new fuel
2. Consult your dealer
1. Clean or replace
2. Consult your dealer
3. Consult your dealer
1. Replace
2. Replace
3. Replace
4. Consult your dealer
1. Clean or replace
2. Clean or replace
3. Consult your dealer
4. Adjust
5. Clean
1. Adjust
2. Consult your dealer
cy stop and consult
your dealer
1. Adjust
2. Consult your dealer
Consult your dealer in the event of a problem that is not covered in the table above, or other such concerns.
Please contact your dealer in order to dispose of the product or its parts in compliance with national laws.
27
Maintenance and care
Manufacturer:
YAMABIKO CORPORATION
7-2 SUEHIROCHO 1-CHOME, OHME, TOKYO 198-8760, JAPAN
Authorized Representative in Europe:
Atlantic Bridge Limited
Atlantic House, PO Box 4800, Earley, Reading RG5 4GB, United Kingdom
Storage
Long-term storage (30 days or more)
WARNING
Do not store in sealed locations filled with fuel gas, or close to naked flames or sparks.
You could cause a fire.
When storing the product for long periods of time (30 days or more), ensure that the following preparations for storage are carried
out.
1. Remove any fuel from the fuel tank.
2. Alternately press and release the purge bulb a number of
times to remove the fuel from the purge bulb.
3. Start the engine and run it at idle speed until it comes to a
natural stop.
4. Move the ignition switch (A) to the Stop position.
5. Once the product is sufficiently cool, wipe clean any grease,
oil, dust, dirt and other materials on the outside of the trimmer.
6. Perform the periodic checks prescribed in this manual.
7. Check that the screws and nuts are tightened. Tighten up
any that are loose.
8. Remove the spark plug (B) and add the appropriate quantity
(around 10 mL) of clean, new 2-stroke engine oil to the cylinder via the installation socket.
9. Place a piece of clean cloth over the spark plug installation
socket.
10. Pull 2 or 3 times on the starter grip to distribute the engine oil
into the cylinder.
11. Observe the piston location through the spark plug hole. Pull
the recoil starter handle slowly until the piston reaches the
top of its travel and leave it there.
12. Fit the spark plug. (Do not connect the spark plug cap (C).)
13. Fit the blade cover onto the trimmer bla de and wrap the engine section in a plastic bag or other covering, and store in a
dry, dust-free location out of reach of children.
28
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