Makita ER2550LH User Manual
Owner’s and Safety Manual
for Petrol String Trimmer
Manuel d’emploi et de sécurité
de Débroussailleuse Thermique
Manual de empleo y de seguridad
para Desbrozadora
ER2550LH
Important:
Read this instruction manual carefully before putting the Petrol String Trimmer into operation and
strictly observe the safety regulations!
Preserve instruction manual carefully!
Important :
Lisez attentivement les instructions du présent manuel avant de vous servir de la débroussailleuse
thermique pour la première fois, et respectez à la lettre les consignes de sécurité!
Conservez précieusement ce manuel d’instructions!
Importante:
Lea este manual de instrucciones con atención antes de utilizar la desbrozadora y ¡observe
estrictamente las regulaciones de seguridad!
¡Conserve cuidadosamente su manual de instrucciones!
English
Thank you very much for purchasing the MAKITA Outdoor Power Equipment.
We are pleased to recommend to you the MAKITA product which is the result of
a long development program and many years of knowledge and experience.
Please read this booklet which refers in detail to the various points that will
demonstrate its outstanding performance. This will assist you to obtain the best
possible result from your MAKITA product.
SYMBOLS
You will note the following symbols when reading the instructions manual.
Read instruction manual and follow the
warnings and safety precautions!
Table of Contents Page
Symbols .........................................................................2
Safety instructions .........................................................3
Technical data................................................................6
Designation of parts.......................................................7
Mounting of handle ........................................................8
Mounting of protector.....................................................8
Mounting of nylon cutting head......................................8
Before start of operation ................................................9
Points in operation and how to stop ............................11
The nylon cutting head ................................................12
Servicing instructions...................................................14
Storage ........................................................................17
Wear protective helmet, eye and ear
protection.
Take particular care and attention!
Forbidden!
Keep distance!
Flying object hazard!
No smoking!
No open ame!
Top permissible tool speed
Fuel (Gasoline)
Engine-manual start
Emergency stop
First Aid
ON/START
Protective gloves must be worn!
Wear sturdy boots with nonslip soles.
Steeltoed safety boots are recommended!
Keep the area of operation clear of all
persons and pets!
2
OFF/STOP
Never use metal blades
360°
SAFETY INSTRUCTIONS
General Instructions
Read this instruction manual to become familiar with handling of the –
equipment. Users insufciently informed will risk danger to themselves as
well as others due to improper handling.
It is recommended only to lend the equipment to people who have proven to –
be experienced.
Always hand over the instruction manual.
First users should ask the dealer for basic instructions to familiarize oneself –
with the handling of string trimmers.
Children and young persons aged under 18 years must not be allowed to –
operate this equipment. Persons over the age of 16 years may however
use the device for the purpose of being trained while under supervision of a
qualied trainer.
Use with the utmost care and attention. –
Operate only if you are in good physical condition. Perform all work calmly –
and carefully. The user has to accept liability for others.
Never use this equipment after consumption of alcohol or drugs, or if feeling –
tired or ill.
National regulation can restrict the use of the machine. –
Intended use of the machine
This equipment is only intended for cutting grass and light weeds. It should –
not be used for any other purpose such as edging or hedge cutting as this
may cause injury.
Personal protective equipment
The clothing worn should be functional and appropriate, i.e. it should be tight- –
tting but not cause hindrance. Do not wear either jewelry or clothing which
could become entangled with bushes or shrubs.
In order to avoid either head-, eye-, hand- or foot injuries as well as to protect –
your hearing the following protective equipment and protective clothing must
be used during operation.
Always wear a helmet where there is a risk of falling objects. The protective –
helmet (1) is to be checked at regular intervals for damage and is to be
replaced at the latest after 5 years. Use only approved protective helmets.
The visor (2) of the helmet (or alternatively goggles) protects the face from –
ying debris and stones. During operation always wear goggles, or a visor to
prevent eye injuries.
Wear adequate noise protection equipment to avoid hearing impairment (ear –
muffs (3), ear plugs etc.).
The work overalls (4) protect against ying stones and debris. –
We strongly recommend that the user wears work overalls.
Gloves (5) are part of the prescribed equipment and must always be worn –
during operation.
When using the equipment, always wear sturdy shoes (6) with a non-slip –
sole. This protects against injuries and ensures a good footing.
Starting up the Petrol String Trimmer
Please make sure that there are no children or other people within a working –
range of 15 meters (50 ft), also pay attention to any animals in the working
vicinity.
Before use always check the equipment is safe for operation: –
Check the security of the cutting attachment, the throttle lever for easy action
and check for proper functioning of the throttle lever lock.
Rotation of the cutting attachment during idling speed is not allowed. Check –
with your dealer for adjustment if in doubt. Check for clean and dry handles
and test the function of the start/stop switch.
Diagrammatic gure
15 Meters
3
Start the Petrol String Trimmer only in accordance with the instructions. –
Do not use any other methods for starting the engine! –
Use the Petrol String Trimmer and the tools only for such applications as –
specied.
Only start the engine, after the entire assembly is done. Operation of the –
device is only permitted after all the appropriate accessories are attached!
Before starting make sure that the cutting attachment has no contact with –
hard objects such as branches, stones etc. as the cutting attachment will
revolve when starting.
The engine is to be switched off immediately in case of any engine problems. –
Should the cutting attachment hit stones or other hard objects, immediately –
switch off the engine and inspect the cutting attachment.
Inspect the cutting attachment at short regular intervals for damage (detection –
of hairline cracks by means of tapping-noise test).
If the equipment gets heavy impact or fall, check the condition before –
continuing work. Check the fuel system for fuel leakage and the controls
and safety devices for malfunction. If there is any damage or doubt, ask our
authorized service center for the inspection and repair.
During operation always hold the Petrol String Trimmer with both hands. –
Never hold the Petrol String Trimmer with one hand during use.
Always ensure a safe footing.
Operate the equipment in such a manner as to avoid inhalation of the exhaust –
gases. Never run the engine in enclosed rooms (risk of gas poisoning).
Carbon monoxide is an odorless gas.
Switch off the engine when resting and when leaving the equipment –
unattended, and place it in a safe location to prevent danger to others or
damage to the machine.
Never put the hot Petrol String Trimmer onto dry grass or onto any –
combustible materials.
Always install the approved cutting attachment guard onto the equipment –
before starting the engine. Otherwise contact with the cutting attachment may
cause serious injury.
All protective installations and guards supplied with the machine must be –
used during operation.
Never operate the engine with faulty exhaust mufer. –
Shut off the engine during transport. –
Ensure safe position of the equipment during car transportation to avoid fuel –
leakage.
When transporting, ensure that the fuel tank is completely empty. –
When unloading the equipment from the truck, never drop the Engine to the –
ground or this may severely damage the fuel tank.
Except in case of emergency, never drop or cast the equipment to the ground –
or this may severely damage the equipment.
Remember to lift the entire equipment from the ground when moving the –
equipment. Dragging the fuel tank is highly dangerous and will cause damage
and leakage of fuel, possibly causing re.
Resting•
Transport•
Refueling•
Maintenance•
Tool replacement•
Refueling
Shut off the engine during refueling, keep away from open ames and do not –
smoke.
Avoid skin contact with mineral oil products. Do not inhale fuel vapor. Always –
wear protective gloves during refueling. Change and clean protective clothing
at regular intervals.
Take care not to spill either fuel or oil in order to prevent soil contamination –
(environmental protection). Clean the Petrol String Trimmer immediately after
fuel has been spilt.
Avoid any fuel contact with your clothing. Change your clothing instantly if –
fuel has been spilt on it (to prevent clothing catching re).
Inspect the fuel cap at regular intervals making sure that it can be securely –
fastened and does not leak.
Carefully tighten the fuel tank cap. Change location to start the engine (at –
least 3 meters away from the place of refueling).
Never refuel in closed rooms. Fuel vapors accumulate at ground lever (risk of –
explosions).
Only transport and store fuel in approved containers. Make sure the fuel –
stored is not accessible to children.
4
3 meters
Method of operation
Only use in good light and visibility. During the winter season beware of –
slippery or wet areas, ice and snow (risk of slipping). Always ensure a safe
footing.
Never cut above waist height. –
Never stand on a ladder. –
Never climb up into trees to perform cutting operation. –
Never work on unstable surfaces. –
Remove sand, stones, nails etc. found within the working range. –
Before commencing cutting, the cutting attachment must have reached full –
working speed.
Swing the Petrol String Trimmer evenly. –
If grass or branches get caught between the cutting attachment and guard,
always stop the engine before cleaning. Otherwise unintentional attachment
rotation may cause serious injury.
Take a rest to prevent loss of control caused by fatigue. We recommend to –
take a 10 to 20-minute rest every hour.
Cutting attachments
Never use metal blades including metal multi-piece pivoting chains and ail –
blades. Otherwise blade contact may cause serious injury.
Vibration
People with poor circulation who are exposed to excessive vibration may –
experience injury to blood vessels or the nervous system. Vibration may
cause the following symptoms to occur in the ngers, hands or wrists: “Falling
asleep” (numbness), tingling, pain, stabbing sensation, alteration of skin color
or of the skin. If any of these symptoms occur, see a physician!
To reduce the risk of “white nger disease”, keep your hands warm during –
operation and well maintain the equipment and accessories.
Maintenance instructions
Have your equipment serviced by our authorized service center, always using –
only genuine replacement parts. Incorrect repair and poor maintenance can
shorten the life of the equipment and increase the risk of accidents.
The condition of the equipment, in particular of the cutting attachment of the –
protective devices must be checked before commencing work.
Turn off the engine and remove spark plug connector when replacing cutting –
attachments, and also when cleaning the cutter or cutting attachment.
Pay attention to the environment. Avoid unnecessary throttle operation for –
less pollution and noise emissions. Adjust the carburetor correctly.
Clean the equipment at regular intervals and check that all screws and nuts –
are well tightened.
Never service or store the equipment in the vicinity of naked ames. –
Always store the equipment in locked rooms and with an emptied fuel tank. –
Observe the relevant accident prevention instructions issued by the relevant trade associations and by the insurance companies.
Do not perform any modications to the equipment as this will endanger your safety.
The performance of maintenance or repair work by the user is limited to those activities as described in the instruction manual. All other work is
to be done by an Authorized Service Agent. Use only genuine spare parts and accessories released and supplied by MAKITA.
Use of non-approved accessories and tools means increased risk of accidents.
MAKITA will not accept any liability for accidents or damage caused by the use of non-approved cutting attachments and xing devices of cutting
attachments, or accessories.
First Aid
In case of accident make sure that a rst-aid box is available in the vicinity of
the cutting operations. Immediately replace any item taken from the rst aid box.
When asking for help, please give the following
information:
Place of accident –
What happened –
Number of injured persons –
Kind of injuries –
Your name –
5
TECHNICAL DATA ER2550LH
Model
Dimensions: length x width x height (without cutting attachment) inch (mm) 64” X 11-3/8” X 18-1/4” (1,623 X 290 X 464)
Cutting diameter inch (mm) 16”-1/4” (412)
Mass (without plastic guard and cutting attachment) lbs (kg) 10.8 (4.9)
Volume (fuel tank) .oz (L) 16.9 (0.5)
Volume (oil reservoir) .oz (L) 2.7 (0.08)
Engine displacement cu.in (cm
Maximum engine performance hp (kw) 1.0 (0.71) at 7,000 rpm
Engine speed at recommended max. spindle speed RPM (1/min) 10,000
Maximum rotational frequency of the spindle RPM (1/min) 7,750
Idling speed RPM (1/min) 3,000
Clutch engagement speed RPM (1/min) 3,750
Carburetor type WALBRO WYL
Ignition system type Solid state ignition
Spark plug type NGK CMR4A
Electrode gap inch (mm) 1/32” (0.7-0.8)
Fuel Automobile gasoline
Engine Oil
(For Canada)
NOTE: This spark ignition system complies with the Canadian standard ICES-002.
3
) 1.49 (24.5)
SAE 10W-30 oil of API Classication,
Class SF or higher (4-stroke engine for automobile)
ER2550LH
Loop handle
6
DESIGNATION OF PARTS
15
14
13
10
9
8
7
5
4
11
12
3
17
16
2
1
6
18
19
15
14
13
10
9
8
7
5
4
11
12
ER2550LH
GB DESIGNATION OF PARTS
1 Fuel tank
2 Rewind starter
3 Air cleaner
4 I-O switch (on/off)
5 Spark plug
6 Exhaust mufer
7 Clutch case
8 Rear grip
9 Lock-off lever
10 Handle
11 Throttle lever
12 Control cable
13 Shaft
14 Protector (Cutting attachment guard)
15 Nylon cutting head
16 Fuel tank cap
17 Starter knob
18 Exhaust pipe
19 Oil gauge
7
MOUNTING OF HANDLE
CAUTION: Before doing any work on the equipment, always stop the
engine and pull the spark plug connector off the spark plug.
Always wear protective gloves!
CAUTION: Start the engine only after having assembled it completely.
For machines with loop handle
Fix the loop handle on the shaft as shown. –
Make sure that the spacer on the shaft pipe is located between the grip –
assembly and the other grip. Do not remove or shrink the spacer.
NOTE: In some countries, the spacer is not provided with the tool. In that case,
align the handle to further side of the line which is indicated by the
arrow marks.
MOUNTING OF PROTECTOR
To meet the applicable safety provisions, only the tool/protector
combinations as indicated in the table must be used.
CAUTION: Do not touch the cord cutter on the protector. Touching the cord
cutter with bare hands may result in injury.
The protector must be installed to maintain the nylon-cutting-cord length and
protect the operator from thrown stones and debris. Install the protector as the
following steps.
Cord cutter
Protector
1. Set the protector so that the rib on the shaft ts into the groove on the
protector.
2. Tighten two bolts.
MOUNTING OF NYLON CUTTING HEAD
WARNING: Never use cutting blades.
Be sure to use genuine MAKITA nylon cutting head.
If the nylon cutting head hits against a stone during operation, stop the –
engine and check the nylon cutting head immediately.
CAUTION: Do not touch the cord cutter on the protector. Touching the cord
cutter with bare hands may result in injury.
Mount a nylon cutting head as the following steps.
1. Insert the lock key through the hole on the clamp. Rotate them with pushing
the lock key in until they are locked.
2. Screw a nylon cutting head onto the shaft by turning it clockwise. Make sure
that it is mounted securely.
3. Remove the lock key.
To remove the nylon cutting head, turn it counterclockwise.
Bolts
Nylon cutting
head
Clamp
Tighten Loosen
Cord cutter
Lock key
8
BEFORE START OF OPERATION
Inspectionandrellofengineoil
Perform the following procedure, with the engine cooled down. –
While keeping the engine level, remove the oil gauge, and conrm that the oil is lled within the upper and lower limit marks. –
When the oil is in short in such a way that the oil gauge touches the oil only by its tip, in particular with the oil gauge remaining inserted in the
crankcase without screwing-in (Fig. 1), rell new oil near the port (Fig. 2).
For reference, the oil rell time is about 10h (10 times or 10 tanks of oil rell). –
If the oil changes in color or mixes with dirt, replace it with new one. (For the interval and method of replacement, refer to P. 14)
Recommended oil: SAE 10W-30 oil of API Classication, Class SF or higher (4-stroke engine for automobile)
Oil volume: Approx. 0.08L
NOTE: If the engine is not kept upright, oil may go into around the engine, and may be relled excessively.
If the oil is lled above the limit, the oil may be contaminated or may catch re with white smoke.
Point 1 in Replacement of oil: “Oil gauge”
Remove dust or dirt near the oil rell port, and detach the oil gauge. –
Keep the detached oil gauge free of sand or dust. Otherwise, any sand or dust adhering to the oil gauge may cause irregular oil circulation –
or wear on the engine parts, which will result in troubles.
As an example to keep the oil gauge clean, it is recommended to insert the oil gauge on its knob side into the engine cover, as shown in –
Fig. 3.
Upper limit (Edge
of oil rell port)
If oil adheres around
this tip, rell new oil.
Fig. 1 Fig. 2 Fig. 3
(1) Keep the engine level, and detach the oil gauge.
(2) Fill oil up to the edge of the oil rell port. (Refer to Fig. 2.)
Feed oil with the lubricant rell container.
Oil gauge
(3) Securely tighten the oil gauge. Insufcient tightening may cause oil leakage.
9
Note
Do not replace oil with the engine in a tilted position.•
Filling with oil while engine is tilted leads to overlling which causes oil contamination and/or white smoke.•
Point 2 in Replacement of oil: “If oil spills out”
If oil spills out between the fuel tank and engine main unit, the oil is sucked into through the cooling air intake port, which will contaminate –
the engine. Be sure to wipe out spilt oil before start of operation.
REFUELING
Handling of fuel
It is necessary to handle fuel with utmost care. Fuel may contain substances similar to solvents. Refueling must be performed in a sufciently
ventilated room or in the open air. Never inhale fuel vapor, and keep fuel away from you. If you touch fuel repeatedly or for a long time, the
skin becomes dry, which may cause skin disease or allergy. If fuel enters into the eye, clean the eye with fresh water. If your eye remains still
irritated, consult your doctor.
Storage period of fuel
Fuel should be used up within a period of 4 weeks, even if it is kept in a special container in a well-ventilated shade.
Otherwise, fuel may deteriorate in one day.
STORAGE OF MACHINE AND REFILL TANK
Keep the machine and tank at a cool place free from direct sunshine. –
Never keep the fuel in a car. –
Fuel
The engine is a four-stroke engine. Be sure to use an unleaded automobile gasoline 87 or higher octane ((R+M)/2). It may contain no more than
10% alcohol (E-10).
Points for fuel
Never use a gasoline mixture which contains engine oil. Otherwise, it will cause excessive carbon accumulation or mechanical troubles. –
Use of deteriorated oil will cause irregular startup. –
Refueling
WARNING: INFLAMMABLES STRICTLY PROHIBITED
Gasoline used: Unleaded automobile gasoline, 87 or higher octane. No more
than 10% alcohol (E-10).
Loosen the tank cap a little so that there will be no difference in atmospheric –
pressure.
Detach the tank cap, and refuel, discharging air by tilting the fuel tank so –
that the refuel port will be oriented upward. (Never rell fuel full to the oil rell
port.)
Wipe well the periphery of the tank cap to prevent foreign matter from –
entering into the fuel tank.
After refueling, securely tighten the tank cap. –
If there is any aw or damage on the tank cap, replace it.•
The tank cap is consumable, and therefore should be renewed every two to •
three years.
Fuel tank cap
Fuel upper limit
Fuel tank
10
POINTS IN OPERATION AND HOW TO STOP
Observe the applicable accident prevention regulations!
STARTING
Move at least 3 m away from the place of refueling. Place the unit on the ground taking care that the cutting attachment does not come into
contact with the ground or any other objects.
A: Cold start
1) Set this machine on a at space.
2) Set the I-O switch (1) to OPERATION.
3) Primer pump
Continue to push the primer pump until fuel enters into the primer pump. (In
general, fuel enters into the primer pump by 7 to 10 pushes.)
If the primer pump is pushed excessively, an excess of gasoline returns to
the fuel tank.
OPERATION
Carburetor
Lock-off lever
STOP
Throttle lever
(1)
High speed
Low speed
Primer pump
4) Recoil starter
Pull the start knob gently until it is hard to pull (compression point). Then,
return the start knob, and pull it strongly.
Never pull the rope to the full. Once the start knob is pulled, never release
your hand immediately. Hold the start knob until it returns to its original
point.
5) Warm-up operation
Continue warm-up operation for 2 to 3 minutes.
NOTE: In case of excessive fuel intake (ooding), remove the spark plug and pull the starter handle slowly to remove excess fuel. Also, dry the
electrode section of the spark plug.
B: Startup after warm-up operation
1) Push the primer pump repeatedly.
2) Keep the throttle lever at the idling position.
3) Pull the recoil starter strongly.
4) If it is difcult to start the engine, open the throttle by about 1/3.
Attention in Operation
When the engine is operated upside down, white smoke may come out from the mufer.
11
At times, such as winter, when starting the engine
is difcult
Operate choke lever with the following procedure when starting engine.
After implementing startup steps 1) to 3), set choke lever to the CLOSE •
position.
Implement startup step 4) and start engine.•
Once engine starts, set choke lever to the OPEN position.•
Implement startup step 5) and complete warm up.•
CLOSE
CAUTION: If a bang (explosive sound) is heard and the engine stops, or
the just-started engine stalls before the choke lever is operated,
return the choke lever to the OPEN position, and pull the starter
knob a few times again to start the engine.
CAUTION: If the choke lever is left in the CLOSE position, and the starter
knob merely pulled repeatedly, too much fuel will be sucked in,
and the engine will become difcult to start.
STOPPING
1) Release the throttle lever (2) fully, and when the engine rpm has lowered,
set the I-O switch to STOP the engine will now stop.
2) Be aware that the cutting head may not stop immediately and allow it to
slow down fully.
OPEN
STOP
(2)
(1)
ADJUSTMENT OF LOW-SPEED ROTATION (IDLING)
When it is necessary to adjust the low-speed rotation (idling), perform it by the carburetor adjusting screw.
CHECKUP OF LOW-SPEED ROTATION
Set the low-speed rotation to 3,000 min –
If it is necessary to change the low speed rotation (idle) speed, use a phillips
head screw driver on the screw illustrated on the right.
Turn the adjusting screw to the right, and the engine rotation will increase. –
Turn the adjusting screw to the left, and the engine rotation will drop.
The carburetor is generally adjusted before shipment. If it is necessary to –
readjust it, please contact Authorized Service Agent.
-1
.
Adjusting
screw
Carburetor
THE NYLON CUTTING HEAD
During operation, use the tip of the nylon cutting cord for cut.
Feeding the nylon cutting cord
As the nylon cutting cord is worn and shortened with the cutting operation, the
operator needs to feed it manually.
Most effective cutting area
To feed the nylon cutting cord, tap the nylon cutting head on the ground while it
rotates around 6,000 min
NOTE: If the nylon cutting cord does not feed out, rewind it.
-1
.
12
80 mm
100 mm
Replacing the nylon cord
WARNING:
Press inward on the housing latches and lift upward to remove the cover.
Discard any of the remaining nylon cord.
Hook the middle of the new nylon cord to the notch located at the center of the
spool between the 2 channels provided for the nylon cord. One side of the cord
should be about 80 mm longer than the other side.
Wind both ends rmly around the spool in the direction marked on the head for
right hand direction indicated by RH.
Wind all but about 100 mm of the cords, leaving the ends temporarily hooked
through a notch on the side of the spool.
Make sure that the cover of the nylon cutting head is secured
to the housing properly as described below. Failure to properly
secure the cover may cause the nylon cutting head to y apart
resulting in serious personal injury.
Latches
For right hand
rotation
Cover
PressPress
Spool
Mount the spool in the housing so that the grooves and protrusions on the spool
match up with those in the housing. Now, unhook the ends of the cord from their
temporary position and feed the cords through the eyelets to come out of the
housing.
Align the protrusion on the underside of the cover with the slots of the eyelets.
Then push cover rmly onto the housing to secure it. Make sure the latches fully
spread in the cover.
Notches
Eyelets
Cover
Protrusion
(Not shown)
Slot of
eyelet
13
SERVICING INSTRUCTIONS
CAUTION: Before doing any work on the equipment, always stop the engine and pull the plug cap off the spark plug (see “checking the
Always wear protective gloves!
To ensure a long service life and to avoid any damage to the equipment, the following servicing operations should be performed at regular
intervals.
spark plug”).
Daily checkup and maintenance
Before operation, check the machine for loose screws or missing parts. Pay particular attention to the tightness of the nylon cutting head. –
Before operation, always check for clogging of the cooling air passage and the cylinder ns. –
Clean them if necessary.
Perform the following work daily after use: –
Clean the equipment externally and inspect for damage.•
Clean the air lter. When working under extremely dusty conditions, clean the lter the several times a day.•
Check the nylon cutting head for damage and make sure it is rmly mounted.•
Check that there is sufcient difference between idling and engagement speed to ensure that the cutting attachment is at a standstill while •
the engine is idling (if necessary reduce idling speed).
If under idling conditions the tool should still continue to run, consult your nearest Authorized Service Agent.
Check the functioning of the I-O switch, the lock-off lever, the throttle lever, and the lock button. –
REPLACEMENT OF ENGINE OIL
Deteriorated engine oil will shorten the life of the sliding and rotating parts to a great extent. Be sure to check the period and quantity of
replacement.
ATTENTION: In general, the engine main unit and engine oil still remain hot just after the engine is stopped. In replacement of oil,
conrm that the engine main unit and engine oil are sufciently cooled down. Otherwise, there may remain a risk of
scald.
NOTE:Iftheoillledabovethelimit,itmaybecontaminatedormaycatchrewithwhitesmoke.
Interval of replacement: Initially, every 20 operating hours, and subsequently every 50 operating hours
Recommended oil: SAE10W-30 oil of API Classication SF Class or higher (4-stroke engine oil for automobile)
In replacement, perform the following procedure.
1) Conrm that the tank cap is tightened securely.
2) Detach the oil gauge.
Keep the oil gauge free from dust or dirt.
3) Place waste or paper near the oil rell port.
Fuel tank cap
Oil gauge
Waste or paper
14
4) Detach the oil gauge, and drain oil, tilting the main unit toward the oil rell
port.
Drain oil in a container for orderly disposal.
5) Keep the engine level, and feed new oil up to the edge of the oil rell port.
In rell, use a lubricant rell container.
6) After rell, securely tighten the oil gauge. Insufcient tightening of the oil
gauge will lead to oil leakage.
POINTS ON OIL
Never discard replaced engine oil in garbage, earth or sewage ditch. Disposal of oil is regulated by law. In disposal, always follow the –
relevant laws and regulations. For any points remaining unknown, contact Authorized Service Agent.
Oil will deteriorate even when it is kept unused. Perform inspection and replacement at regular intervals (replace with new oil every –
6 months).
CLEANING OF AIR CLEANER
DANGER: INFLAMMABLES STRICTLY PROHIBITED
Interval of Cleaning and Inspection: Daily (every 10 operating hours)
Turn the choke lever to the full close side, and keep the carburetor off from –
dust or dirt.
Remove the air cleaner cover-xing bolts. –
Pull the cover lower side and detach the air cleaner cover. –
If oil adheres to the element (sponge), squeeze it rmly. –
For heavy contamination: –
1) Remove the element (sponge), immerse it in warm water or in waterdiluted
neutral detergent, and dry it completely.
2) Clean the element (felt) with gasoline, and dry it completely.
Before attaching the element, be sure to dry it completely. Insufcient drying –
of the element may lead to difcult startup.
Wipe out with waste cloth, oil adhering around the air cleaner cover and plate –
breather.
Immediately after cleaning is nished, attach the cleaner cover and tighten it –
with xing bolts. (In remounting, rst place the upper claw, and then the lower
claw.)
Points in Handling Air Cleaner Element
Clean the element several times a day, if excessive dust adheres to it. –
If operation continues with the element remaining not cleared of oil, oil in –
the air cleaner may fall outside, resulting in oil contamination.
Plate
Element (sponge)
Air cleaner cover
Breather part
Element (felt)
Fixing bolt
Pick this part and remove
the element (felt).
15
CHECKING THE SPARK PLUG
Only use the supplied universal wrench to remove or to install the spark plug. –
The gap between the two electrodes of the spark plug should be 0.7 - 0.8 mm –
(0.028” - 0.032”). If the gap is too wide or too narrow, adjust it. If the spark
plug is clogged or contaminated, clean it thoroughly or replace it.
CAUTION: Never touch the spark plug connector while the engine is
running (danger of high voltage electric shock).
CLEANING OF FUEL FILTER
WARNING: INFLAMMABLES STRICTLY PROHIBITED
Interval of Cleaning and Inspection: Monthly (every 50 operating hours)
Suction head in the fuel tank
The fuel lter (1) of the suction head is used to lter the fuel required by the –
carburetor.
A periodical visual inspection of the fuel lter is to be conducted. For that –
purpose open the tank cap, use a wire hook and pull out the suction head
through the tank opening. Filters found to have hardened, been polluted or
clogged up are to be replaced.
Insufcient fuel supply can result in the admissible maximum speed being –
exceeded. It is therefore important to replace the fuel lter at least quarterly to
ensure satisfactory fuel supply to the carburetor.
REPLACEMENT OF FUEL PIPE
CAUTION: INFLAMMABLES STRICTLY PROHIBITED
Interval of Cleaning and Inspection: Daily (every 10 operating hours)
Replacement: Annually (every 200 operating hours)
Replace the fuel pipe every year, regardless of operating frequency. Fuel
leakage may lead to re.
If any leakage is detected during inspection, replace the fuel pipe immediately.
0.7 mm - 0.8 mm
(0.028” - 0.032”)
Fuel pipe
Hose clamp
Fuel lter (1)
Fuel pipe
INSPECTION OF BOLTS, NUTS AND SCREWS
Retighten loose bolts, nuts, etc. –
Check for fuel and oil leakage. –
Replace damaged parts with new ones for safety operation. –
CLEANING OF PARTS
Keep the engine always clean. –
Keep the cylinder ns free of dust or dirt. Dust or dirt adhering to the ns will –
cause piston seizure.
REPLACEMENT OF GASKETS AND PACKINGS
In reassembling after the engine is dismounted, be sure to replace the gaskets and packings with new ones.
Any maintenance of adjustment work that is not included and described in this manual is only to be performed by Authorized Service Agents.
16
STORAGE
WARNING: When draining the fuel, be sure to stop the engine and make sure that the engine
cools down.
Just after stopping the engine, it may still be hot with possibility of burns,
inammabilityandre.
ATTENTION: When the machine is kept out of operation for a long time, drain up all fuel from the
fuel tank and carburetor, and keep it at a dry and clean place.
Drain fuel from the fuel tank and carburetor according to the following procedure: –
1) Remove the fuel tank cap, and drain fuel completely.
If there is any foreign matter remaining in the fuel tank, remove it completely.
2) Pull out the fuel lter from the rell port using a wire.
3) Push the primer pump until fuel is drained from there, and drain fuel coming into the fuel tank.
4) Put the lter to the fuel tank, and securely tighten the fuel tank cap.
5) Then, continue to operate the engine until it stops.
Remove the spark plug, and drip several drops of engine oil through the spark plug hole. –
Gently pull the starter handle so that engine oil will spread over the engine, and attach the spark plug. –
During storage, keep the rod horizontal or keep the machine upright with the cutting attachment side oriented upward. (In this case, pay full –
attention to prevent the machine from falling.)
Never store the machine with the cutting attachment side oriented downward. Lubricating oil may spill out.
Keep the drained fuel in a special container in a well-ventilated shade. –
Attention after long-time storage
Before startup after long-time shutdown, be sure to replace oil (refer to P 14). Oil will deteriorate while the machine is kept out of –
operation.
Fault location
Fault System Observation Cause
Engine not starting or with
difculty
Warm start problems Tank lled ignition spark
Engine starts but dies Fuel supply Tank lled Incorrect idling adjustment, carburetor contaminated
Insufcient performance Several systems may
Ignition system Ignition spark O.K. Fault in fuel supply or compression system, mechanical
defect
No ignition spark STOP-switch operated, wiring fault or short circuit, spark
plug or connector defective, ignition module faulty
Fuel supply Fuel tank lled Incorrect choke position, carburetor defective, fuel supply
line bent or blocked, fuel dirty
Compression No compression when
pulled over
Mechanical fault Starter not engaging Broken starter spring, broken parts inside of the engine
existing
Engine idling poor Air lter contaminated, carburetor contaminated, mufer
simultaneously be
affected
Cylinder bottom gasket defective, crankshaft seals
damaged, cylinder or piston rings defective or improper
sealing of spark plug
Carburetor contaminated, have it cleaned
Fuel tank vent defective, fuel supply line interrupted,
cable or STOP-switch faulty
clogged, exhaust duct in the cylinder clogged
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