PB7660.4 - Blower DOLMAR - Free user manual and instructions

USER MANUAL PB7660.4 DOLMAR

/minute (with short pipe) 20 m

Engine type Air cooled, 4-stroke, single cylinder Fuel Automobile gasoline Fuel tank capacity 1,900 cm

Engine oil API grade SF class or higher, SAE 10W-30 oil (automobile 4-stroke engine oil) Engine oil volume 220 cm

• Due to our continuing program of research and development, the specications herein are subject to change without notice.

• Specications may differ from country to country. Vibration Model PB-7660.4 PB-7660.4 H Vibration per EN15503 2009 Right handle a hv eq Long pipe with circular nozzle

with at nozzle 3.4 (m/s

Short pipe with circular nozzle

with at nozzle 3.5 (m/s

Uncertainty K 1.2 (m/s

Left handle (cotrol arm)

with at nozzle - 0.6 (m/s

Short pipe with circular nozzle - 0.7 (m/s

with at nozzle - 0.6 (m/s

Noise Model PB-7660.4 PB-7660.4 H Sound pressure level average to EN15503 2009

Uncertainty K 0.7 (dB(A)) 0.7 (dB(A)) Symbols The followings show the symbols used for the equipment. Be sure that you understand their meaning before use. Take particular care and attention! Read and follow the instruction manual. Forbidden! No smoking. No open ame. Wear protective gloves. 2 ENGLISHWear eye and ear protection. Hot surfaces - Burns to ngers or hands. Keep bystanders away. Keep the area of operation clear of all persons and pets. Fuel (gasoline) Engine manual start. Stop the engine. First aid On/Start Off/Stop Long hair may cause entanglement accident. EC Declaration of Conformity For European countries only The EC declaration of conformity is included as Annex A to this instruction manual.

IMPORTANT SAFETY INSTRUCTIONS

General instructions

1. To ensure correct and safe operation, the user must read,

understand and follow this instruction manual to assure familiarity with the handling of the blower. Users insuf- ciently informed will risk danger to themselves as well as others due to improper handling.

2. It is recommended only to lend the blower to people who

have proven to be experienced with blowers.

4. First-time users should ask the dealer for basic instructions

to familiarize oneself with the handling of a blower.

5. Children and young persons aged under 18 years must not

be allowed to operate the blower. Persons over the age of 16 years may however use the tool for the purpose of being trained only while under the direct supervision of a qualied trainer.

6. Use blowers with the utmost care and attention.

7. Operate the blower only if you are in good physical

8. Perform all work conscientiously and carefully. The user has

to accept responsibility for others.

9. Never use the blower while under the inuence of alcohol or

10. Do not use the unit when you are tired.

11. Save these instructions for future reference.

12. Observe and follow all relevant accident prevention instruc-

tions issued by the trade associations and by insurance companies. Do not perform any modications to the blower as this will risk your safety.

13. Never make modication on the equipment. It may cause

dangerous accidents or personal injury. Personal protective equipment

1. The clothing worn should be functional and appropriate, i.

e., it should be tight tting but not cause a hindrance. Do not wear jewelry, clothing or long hair which could be drawn into the air intake.

2. In order to avoid 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 of the blower.

3. Clothing must be sturdy and snug-tting, but allow com-

plete freedom of movement. Avoid loose-tting jackets, ared or cuffed pants, scarves, unconned long hair or any- thing that could be drawn into the air intake. Wear overalls or long pants to protect your legs. Do not wear shorts.

4. Generally, engine products are noisy and their noise may

damage your hearing. Wear sound barriers (ear plugs or ear mufers) to protect your hearing. Continual and regular users should have their hearing checked regularly.

5. Use of gloves when working with the blower is recom-

mended. Wear sturdy shoes with non-slip soles.

6. Proper eye protection is a must. Even though the discharge

is directed away from the operator, ricochets and bounce- backs can occur during blower operation.

7. Never operate a blower unless wearing goggles or properly

tted safety glasses with adequate top and side protection which comply with EN166 and regulations in your country.

8. To reduce the risk of injury associated with the inhalation of

dust, use face lter mask in dusty conditions. Intended use The tool is intended for blowing dust. 3 ENGLISHStarting up the blower

1. Make sure that there are no children or other people within

a working range of 15 meters, also pay attention to any ani- mals near by.

2. Before operating, always check that the blower is safe for

operation: — Check the security of the throttle lever. The throttle lever should be checked for smooth and easy action. — Check for proper functioning of the throttle lever lock. — Check for clean and dry handles and test the function of the l-O switch. Keep handles free of oil and fuel.

3. Start the blower only in accordance with the instructions.

Do not use any other methods for starting the engine.

4. Use the blower and the tools supplied only for applications

5. Start the blower engine only after the entire tool has been

assembled. Operation of the tool is permitted only after all the appropriate accessories are attached.

6. The engine is to be switched off immediately if there are any

7. When working with the blower, always wrap your ngers

tightly around the handle, keeping the control handle cra- dled between your thumb and forenger. Keep your hand in this position to have your machine under control at all times. Make sure your control handle is in good condition and free of moisture, pitch, oil or grease.

8. Always ensure a safe, well-balanced footing.

9. Carry the blower properly on both shoulders during opera-

tion. Do not carry the blower with only one shoulder strap. Otherwise personal injury may result.

10. Operate the blower in such a manner as to avoid inhalation

of the exhaust gases. Never run the engine in enclosed rooms (risk of suffocation and gas poisoning). Carbon mon- oxide is an odorless gas. Always ensure there is adequate ventilation.

11. Stop the engine when resting or leaving the blower unat-

tended. Place it in a safe location prevent danger to others, setting re to combustible materials, or damage to the machine.

13. All protective parts and guards supplied with the machine

must be used during operation.

14. Never operate the engine with a faulty exhaust mufer.

1. Stop the engine during transport.

2. Position the blower safely during car or truck transportation

to avoid fuel leakage.

3. When transporting the blower, ensure that the fuel tank is

4. Lift the blower with holding carry handle when you carry it.

Do not drag the blower by nozzle, pipe or other parts.

5. Hold the blower rmly during transportation.

6. When transport the blower, bend your knee and make sure

you do not damage your shoulder and lower back. Refuelling

1. Stop the engine during refuelling, keep well away from open

ame and do not smoke.

2. Avoid skin contact with petroleum products. Do not inhale

fuel vapor. Always wear protective gloves during refuelling. Change and clean protective clothing at regular intervals.

3. Take care not to spill either fuel or oil in order to prevent soil

contamination (environmental protection). Clean the blower immediately after fuel has been spilt. Allow wet cloths to dry before disposing in properly, covered container to prevent spontaneous combustion.

4. Avoid any fuel contact with your clothing. Change your

clothing immediately if fuel has been spilled on it (re hazard).

5. Inspect the fuel cap at regular intervals making sure that it

stays securely fastened.

6. Carefully tighten the fuel cap. Change locations to start

the engine (at least 3 meters (10 ft) away from the place of refuelling). 4 ENGLISH7. Never refuel in closed rooms. Fuel vapors accumulate at ground level (risk of explosions).

8. Only transport and store fuel in approved containers. Make

sure stored fuel is not accessible to children.

9. Do not attempt to refuel a hot or a running engine.

10. Do not refuel more than the amount dened in

“SPECIFICATIONS”. Method of operation

1. Use the blower only in good light and visibility. Beware of

slippery or wet areas, ice and snow (risk of slipping), and narrow space. Always ensure a safe footing.

2. Never work on unstable surfaces or steep terrain.

3. Do not work from ladders or high places. Otherwise it may

result in personal injury.

4. To reduce the risk of personal injury, do not direct air blast

towards bystanders, since the high pressure of the air ow could injure eyes and could blow small objects at great speed.

5. Never insert any foreign object into the air intake of the

machine or into the nozzle of the blower. It will damage the fan wheel and may cause serious injury to the operator or bystanders as a result of the object or broken parts being thrown out at high speed.

6. Pay attention to the direction of the wind, i.e., do not work

7. To reduce the risk of stumbling and loss of control, do not

walk backward while operating the machine.

8. Always stop the engine before cleaning or servicing the unit

9. Take a rest to prevent loss of control caused by fatigue. We

recommend to taking a 10 to 20-minute rest every hour.

10. Do not operate the machine near the windows, etc.

11. To reduce physical inuence from vibration and/or damage

to the ears, operate the machine at low speed if possible and limit the time of operation.

12. Operate the machine only at reasonable hours. Do not oper-

ate the blower in the morning or late at night when people might be disturbed.

13. It is recommended for using rakes and brooms to loosen

debris before blowing.

14. Before blowing, slightly dampen surfaces in dusty condi-

tions or use water mist sprayer if necessary.

15. Adjust the length of the blower nozzle so that the stream

can work close to the ground.

16. To reduce sound levels, limit the number of pieces of equip-

ment used at any one time.

17. After using blowers and other equipment, CLEAN UP!

Dispose of debris in trash receptacles.

18. Do not accelerate the engine more than necessary. Blown

object may result in personal injury.

19. The exhaust mufer becomes hot during the operation. Do

not touch hot exhaust mufer, skin burn may result.

20. Do not operate the machine in explosive atmospheres, such

as in the presence of ammable liquids, gases or dust. The machine creates sparks which may ignite the dust or fumes.

21. Hold the blower rmly. Do not hold the blower with wet

hands. Maintenance instructions

1. Be kind to the environment. Operate the blower with as lit-

tle noise and pollution as possible. In particular, check the correct adjustment of the carburetor (adjustment of idling speed).

2. As instructed in this manual, clean the blower at regular

intervals and check that all screws and nuts are securely tightened.

3. Never service or store the blower in the vicinity of open

4. Always store the blower in a well-ventilated locked room

and with the fuel tank emptied.

5. The performance of maintenance or repair work by the user

is limited to those activities as described in this instruction manual. All other work is to be done by Authorized Service Agents.

6. Use only genuine spare parts and accessories supplied by

Makita/Dolmar. Use of non-approved accessories and tools may result in accidents and injuries. Makita/Dolmar will not accept any liability for accidents or damage caused by the use of any non-approved attachment or accessories.

7. Incorrect repair and poor maintenance can shorten the life

of the equipment and increase the risk of accidents. First aid

1. In case of accident make sure that a well-stocked rst-aid kit is

available in the vicinity of the operations. Immediately replace any item taken from the rst aid kit.

2. When asking for help, give the following information:

— Place of the accident — What happened — Number of injured persons — Nature of the injury — Your name 5 ENGLISHPARTS DESCRIPTION

• Standard accessories may differ from country to country. 6 ENGLISHASSEMBLY CAUTION: Before performing any work on the blower, always stop the engine and pull the spark plug cap off the spark plug. CAUTION: Start the blower only after having assembled it completely. CAUTION: Always wear protective gloves. Assembling blower pipes

1. Insert the swivel pipe into the exible pipe and tighten them with

2. Loosen and remove the clamp screw.

and tighten them with the clamp screw.

4. Attach the exible pipe to the elbow

For tube throttle model: Insert the elbow to the exible pipe. Attach the cable holder between the hose band and the exible pipe. Tighten the cable holder, exible pipe and elbow with the hose band. Set the control cable onto the cable holder, and close the cable holder.

► 1. Cable holder 2. Control cable For hip throttle model: Insert the elbow to the exible pipe. Tighten the exible pipe and the elbow with the hose band.

5. Attach the long/short pipe to the swivel pipe. Turn the long/short

pipe clockwise to lock it into place. Then attach the blower nozzle with the long/short pipe. Turn the blower nozzle clockwise to lock it into place.

6. Make sure all clamps are tight.

7 ENGLISHBEFORE STARTING THE ENGINE

Checking and rell of engine oil CAUTION: When relling with engine oil, stop the engine and wait for the engine to cool down. Otherwise skin burn may result. NOTICE: Use of deteriorated oil will cause irregular start-up. NOTICE: Remove dust or dirt near the oil rell port before detaching the oil cap. Also, keep the detached oil cap free of sand or dust. Otherwise, any sand or dust adhering to the oil cap may cause irregular oil circulation or wear on the engine parts, which will result in troubles.

► 1. Oil gauge 2. Upper limit mark 3. 100 ml level 4. Lower limit mark Inspection Put the blower on a at surface and remove the oil cap. Check the oil gauge. Make sure that the oil level is within the upper and lower limit marks. If the oil is not up to the 100 ml level, ll up with new oil. Change the oil whenever it becomes dirty or signicantly changes color. (Refer to “Replacing engine oil” for the oil change procedure and frequency.) Rell Put the blower on a at surface and remove the oil cap. Fill the oil up to the upper limit of the oil level gauge. On average, engine oil needs to be added after every 20 hours of operation (every 10 – 15 refuellings). Recommended oil

• Makita/Dolmar genuine 4-stroke engine oil or

• API grade SF class or higher, SAE 10W-30 oil (automobile 4-stroke engine oil) Oil capacity Approximately 220 ml NOTICE: Store the blower in an upright position on at sur- face. The oil gauge does not indicate correct amount of oil if the blower is leaned and oil is own into the engine. It may result in lling too much oil. NOTICE: Do not ll with excessive oil. Excessive oil may spill from the breather of the air cleaner and make surrounding parts dirty, or white smoke may appear due to burning oil. After relling with oil Wipe spilled oil with a rag. Fuel supply

When refuelling, stop the engine and wait for the engine to cool down. Otherwise ignition, a re, or skin burns may result.

WARNING: The engine must be refueled in a location free

of re to prevent ignition or a re. Never bring the re (smok- ing, etc.) near the fuel supply.

WARNING: Refuel on a at surface. Do not refuel on an

unstable surface. Refuel in good light and visibility.

WARNING: Open the fuel tank cap slowly. The fuel may spill

out due to internal pressure.

Take care not to spill the fuel. Wipe up spilled fuel.

WARNING: Refuel the engine in a well-ventilated place.

WARNING: Refuel in an open, empty location.

WARNING: Handle the fuel with care.

CAUTION: Fuel adhering to the skin or entering an eye may cause allergies or irritation. If any physical abnormalities are detected, consult the medical specialist immediately. NOTICE: DO NOT put oil in the fuel tank. Fuel

WARNING: Keep the machine and tank in a cool place out

WARNING: Never keep fuel in a car.

This engine is a 4-stroke engine. Be sure to use automobile gasoline (regular gasoline or premium gasoline). NOTICE: Never use gasoline mixed with oil, such as 2-stroke oil or motor oil. Doing so can cause excessive carbon accumula- tion or mechanical problems. NOTE: Keep fuel in a special container in a well-ventilated and shaded area. Use fuel within a period of 4 weeks. Otherwise, fuel may deteriorate in one day. Refuelling method CAUTION: If the tank cap is damaged or awed, replace it. CAUTION: The tank cap wears over time. Replace the tank cap every two to three years. NOTICE: DO NOT put fuel in the oil ll port.

1. Loosen the tank cap a little to release the tank pressure.

2. Detach the tank cap, and refuel gently, while discharging air by

tilting the fuel tank so that the refuel port is oriented upward. DO NOT ll up to the top.

3. After refuelling, securely tighten the tank cap.

Never attempt to start the engine where refueling is performed. Doing so may cause ignition or a re. When starting the engine, maintain a distance of at least 3 meters from refueling site.

WARNING: Exhaust gas from the engine is toxic. Do not

operate the engine in a poorly-ventilated location, such as in a tunnel, building, etc. Operating the engine in a poorly-ventilated location may cause poisoning by exhaust gas.

If you detect any strange sounds, odor, or vibrations after starting, stop the engine immediately and inspect it. If the engine is operated without attending to such problems, an accident may occur.

WARNING: Do not touch hot engine cover. Otherwise skin

WARNING: Be sure that there are no fuel leaks before

starting the engine.

WARNING: Make sure that the engine stops when the stop

switch is set to “O” position. 8 ENGLISHWhen the engine is cold or after refuelling (cold start)

1. Put the blower on a at surface.

For tube throttle model: Set the stop control lever to “I” position.

► 1. Stop control lever For hip throttle model: Set the stop switch to “I” position. And make sure that the throttle lever is set to low speed position.

3. Continue to push the primer pump until fuel comes into the

► 1. Primer pump 2. Choke lever NOTE: In general, fuel comes into the carburetor by 7 to 10 pushes. NOTE: Even the primer pump is pushed excessively, an excess of gasoline returns to the fuel tank.

4. Lift the choke lever to the closed position.

5. Stump the pedal with your right foot, and hold the top of the unit

cover with left hand to prevent the engine from moving.

6. Pull out slowly the starter handle till feeling compression. Then

pull it strongly. NOTICE: Never pull the rope to its full extension. NOTICE: Return the starter knob gently into the housing. Otherwise released starter knob may hit your body or it may not rewind appropriately. NOTE: If the engine res and stops, return the choke lever to the “OPEN” position and pull the starter handle several times to start the engine again.

7. When the engine starts, down the choke lever to open position.

NOTE: Open the choke lever fully before pulling the throttle. NOTE: In cold temperature or when the engine is not warm enough, never open the choke lever suddenly. Otherwise, the engine may stop.

8. Warm-up for 2 to 3 minutes with engine speed idle or low.

9. Warm-up is complete when quick engine acceleration from low

rpm to full throttle is felt. NOTE: If the operator keeps pulling the starter handle several times with the choke lever left in the “CLOSE” position, the engine may be difcult to start because of ooding of the fuel. In case of ooding of the fuel, remove the spark plug and pull the handle several times rapidly to discharge any excess fuel. Dry the spark plug electrode. When the engine is warm (warm start)

1. Put the blower on a at surface.

2. Push the primer pump several times.

3. Make sure that the choke lever is open.

4. Stump the pedal with your right foot, and hold the top of the unit

cover with left hand to prevent the engine from moving.

6. When the engine is difcult to start, open the throttle by about

1/3. 9 ENGLISHStopping the engine For tube throttle model: Release the throttle trigger and then set the stop control lever to “O” position.

► 1. Throttle trigger 2. Stop control lever For hip throttle model: Set the throttle lever to the low speed posi- tion to reduce the engine speed. Then set the stop switch to “O” position.

► 1. Throttle lever 2. Stop switch Prevention from carburetor icing NOTICE: When environmental temperature is higher than 10°C, always return the lever to normal (sun mark) setting. Otherwise the engine may be damaged by overheating. When the environmental temperature is low and humidity is high, water vapor may freeze inside the carburetor and the engine drives unsteadily (carburetor icing). Change the setting of the anti icing lever as follows if necessary. Environment temperature is higher than 10°C: Turn the lever to nor- mal position (sun mark). Environment temperature is equal or lower than 10°C: Turn the lever to anti-icing position (snow mark). Adjusting shoulder strap

1. Adjust the shoulder strap to a length that is comfortable to work

while carrying the blower. To fasten the strap, pull the end of the strap downwards.

2. Pull the stabilizer strap until there are no space left between your

back and the blower housing. To fasten the strap, pull the end of the strap downwards.

► 1. Fastener Hip belt Optional accessory The hip belt enables the operator to carry the tool more stably. CAUTION: Make sure to release the hip belt buckle before unloading the blower. Adjusting the control lever position For tube throttle model: Move the control handle along the swivel pipe to the most comfortable position. Then tighten the control handle with the screw.

► 1. Screw For hip throttle model: Move the handle assembly along the swivel pipe to the most comfortable position. Then tighten the handle with the screw.

1. While operating the blower, adjust the throttle trigger / throttle

lever so that the wind force is appropriate for the work location and conditions. 11 ENGLISH2. Adjusting engine speed. For tube throttle model: Engine speed increases by pulling the throttle trigger. To decrease the engine speed, loosen the throttle trigger. The cruise control function allows the operator to maintain a constant engine speed without pulling the trigger lever. To increase the engine speed, turn the stop control lever to high speed. To decrease the engine speed, turn the stop control lever to low speed.

► 1. Throttle trigger 2. Stop control lever For hip throttle model: To increase the engine speed, turn the throt- tle lever to high speed. To decrease the engine speed, turn the throt- tle lever to low speed.

► 1. Throttle lever Transporting the blower CAUTION: When transporting the blower, be sure to stop the engine. NOTICE: Do not sit or stand on the blower or put a heavy object on it. It may damage the machine. NOTICE: Maintain the blower in an upright position whenever transporting or storing. Transporting or storing in a position that is not upright may cause oil to spill inside the blower engine. This may result in oil leaks and white smoke from burning oil, and the air cleaner may become dirty with oil. NOTICE: Do not drag the blower when transporting. Otherwise the blower housing may be damaged. MAINTENANCE CAUTION: Before inspection and maintenance, stop the engine and allow it to cool down. Remove the spark plug and plug cap. Otherwise the operator may suffer burn or serious injury due to an accidental start-up. CAUTION: After inspection and maintenance, make sure that all parts are assembled. Replacing engine oil CAUTION: The engine main unit and engine oil still remain hot just after the engine is stopped. When replacing engine oil, make sure that the engine main unit and engine oil are suf- ciently cooled down. Otherwise, there may remain a risk of scald. Allow sufcient time after stopping engine for the engine oil to return to the oil tank to ensure accurate reading of the oil level indicator. CAUTION: If the oil lled above the limit, it may become dirty or may catch re with white smoke. NOTICE: Never discard replaced engine oil in garbage, ground or sewage. 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. NOTICE: Oil will deteriorate even when it is kept unused. Perform inspection and replacement at regular intervals (replace with new oil every 6 months). Deteriorated engine oil shortens the life of the sliding and rotating parts to a great extent. Be sure to check the period and quantity of replacement. Interval of replacement After rst 20 operating hours, followed by every 50 operating hours Recommended oil

• Makita/Dolmar genuine 4-stroke engine oil or

• API grade SF class or higher, SAE 10W-30 oil (automobile 4-stroke engine oil) Oil replacement procedure Change the oil as follows:

1. Put the blower down on a level surface.

2. Put a waste oil container under the drainage hole to catch the oil

as it drains out. The container should have a capacity of at least 220 ml to catch all of the oil.

3. Loosen the oil drain bolt to let the oil drain out. Be careful not to

allow oil to get on the fuel tank or other parts. NOTICE: Be careful not to lose the gasket (aluminum washer). Put the oil drain bolt in a location where it does not get dirt.

4. Remove the oil cap. (Removing the oil cap allows the oil to drain

easily.) NOTICE: Be sure to set the oil cap down in a location where it does not get dirt.

5. As the level of the oil being drained decreases, tilt the blower

over on to the side with the drain so that the oil will completely drain out.

6. After the oil has completely drained out, tighten the oil drain bolt

securely. If the bolt is not tightly fastened, it may result in oil leakage. NOTICE: Do not forget to put the gasket (aluminum washer) back on when reattaching the drain plug. 12 ENGLISH7. Pour approximately 220 ml oil into the oil rell port up to the upper limit of the oil gauge.

8. After lling with oil, tighten the oil cap securely to prevent oil

leaks. NOTICE: Do not forget to put the oil cap gasket back on when reattaching the oil cap. Cleaning of air cleaner

WARNING: INFLAMMABLES STRICTLY PROHIBITED

Interval of Cleaning and Inspection Daily (every 10 operating hours) Cleaning procedure

2. Remove the air cleaner cover.

3. Remove the element and clean off any dirt from the element with

a cloth or air blow. Replace the element with a new one if it is dam- aged or very dirty. NOTE: The element is a dry type and should not get wet. Never wash with water.

4. Wipe off any oil around the breather with a rag or cloth.

5. Install the element in the air cleaner case.

6. Attach the air cleaner cover and tighten the knob bolts.

NOTICE: Clean the element several times a day, if excessive dust adheres to it due to dusty environment. NOTICE: If operation continues with the element remaining not cleared of oil, oil in the air cleaner may fall outside, result- ing in oil contamination. Checking the spark plug CAUTION: Do not touch the spark plug while the engine is running. Otherwise electrical shock may result. CAUTION: Set the stop control lever/stop switch to OFF “O” position. CAUTION: Check the spark plug cord regularly. If the spark plug cord is damaged or torn, replace it. Not doing so may cause an electrical shock. NOTICE: When removing the spark plug, clean the spark plug and cylinder head rst, so that no dirt, sand, etc., will enter the cylinder. NOTICE: Remove the spark plug after the engine has cooled down in order to avoid damaging the threaded hole in the cylinder. NOTICE: Install the spark plug properly into the threaded hole. If installed at an angle, the threaded hole in the cylinder will be damaged.

1. To open the plug cover, lift it and make a half turn of it.

2. Use the box wrench provided as an standard accessory to

remove and install the spark plug. 13 ENGLISH3. The appropriate clearance between two electrodes of spark plug is 0.7 to 0.8 mm. Adjust to the correct clearance when it is too wide or too narrow. Clean thoroughly or replace the spark plug if it has accumulated car- bon or contaminated. For replacement, use NGK CMR6H.

0.7 mm – 0.8 mm (0.028″ – 0.031″)

4. To close the plug cover, make a half turn of it, and press around

► 1. Plug cover Cleaning the fuel lter CAUTION: Make sure there is no damage on the fuel tank. If there are any damage on the fuel tank, ask authorized service center immediately for repair. NOTICE: Clean the fuel lter regularly. Clogged fuel lter may cause difculty of start-up or failure of engine speed increase. Check the fuel lter regularly as follows:

1. Remove the fuel tank cap, drain the fuel to empty the tank.

Check the tank inside for any foreign materials. If any, wipe clean such materials.

2. Pull out the fuel lter with wire through the fuel lling port.

3. If the fuel lter surface is contaminated, clean it with gasoline.

NOTICE: Follow the method specied by each local authority for disposing the gasoline used for cleaning the fuel lter. NOTICE: Replace the fuel lter if it is excessively contaminated.

4. After checking, cleaning or replacing, insert the fuel lter into the

fuel pipe and x it with the hose clamp. Reset the fuel lter in the fuel tank and tighten rmly the fuel tank cap. Adjustment of idling speed CAUTION: The carburetor is factory adjusted. Never adjust other than idling speed. For other adjustments, ask your autho- rized service center. Appropriate low-speed rotation is 2,800 min

(rpm). If it is necessary to change the rotation speed, adjust the idle speed with a Phillips screwdriver. If the engine stops or runs unsteadily at idle, turn the adjusting screw to the right, and the idling speed increases. If the machine blows too strong at idle, turn the adjusting screw to the left, and the idling speed drops.

► 1. Idling adjusting screw Checking throttle valve If the control cable is bent or caught, the throttle valve does not con- tact with the idle adjusting screw, and it prevents the engine from proper idling. In such a case, reposition the control cable to ensure proper valve movement.

14 ENGLISHIf the throttle valve does not touch the throttle valve stopper even you pull the throttle trigger fully or if the throttle valve does not touch the idling adjusting screw while idling, turn the cable adjusting bolt as follows:

1. Loosen the xing nut.

2. If the throttle valve does not touch the throttle valve stopper, turn

the cable adjusting bolt counterclockwise. If the throttle valve does not touch the idling adjusting screw, turn the cable adjusting bolt clockwise.

Cleaning carburetor cover If the carburetor cover gets dirty and it is difcult to check the throttle valve, clean the carburetor cover as follows: NOTICE: Never use gasoline, benzine, thinner, alcohol or the like for cleaning the carburetor cover. Otherwise it may be tarnished.

1. Pass a slotted screwdriver through the hole on the engine cover.

Release the clamp of the carburetor cover.

2. Clean the carburetor cover.

NOTICE: Use wet clean cloth for cleaning the carburetor cover.

3. Return the carburetor cover. Make sure the clamp of the carbure-

tor cover clicks when it is set in place. Inspecting bolts, nuts and screws and other parts Retighten loose bolts, nuts, etc. Check for fuel and oil leakage. Replace damaged parts with new ones for safety operation. Cleaning engine, cooling air inlet Keep engine clean by wiping down with a cloth rag. Keep the cylinder ns free of dust or dirt. Dust or dirt adhering to the ns may cause engine overheat and piston seizure. Blowing air is taken in from the air inlet vent. When airow drops down during operation, stop engine and inspect the air inlet vent for any blockages. Clean it if necessary. Such a blockage may cause overrun and damage the engine or fan. Replacing gaskets and packings Replace gaskets and packings if the engine is disassembled. Any maintenance of adjustment work that is not included and described in this manual is only to be performed by Authorized Service Agent. Storage

WARNING: When draining the fuel, stop the engine and

wait for the engine to cool down. Failure to do so may cause burns or re. CAUTION: When you store the machine for a long time, drain 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 before storing the machine as follows:

1. Remove the fuel tank cap, and drain fuel completely. If there is

any foreign materials 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. Reset the lter to the fuel tank, and securely tighten the fuel tank

5. Then, continue to operate the engine until it stops.

6. Remove the spark plug, and drip several drops of engine oil

through the spark plug hole.

7. Gently pull the starter handle so that engine oil will spread over

the engine, and attach the spark plug.

8. Keep the machine with its carry handle upside.

9. Keep the drained fuel in a special container in a well-ventilated

shade. 15 ENGLISHFault location Fault System Observation Cause Engine not starting or with difculty Ignition system Ignition sparks. Fault in fuel supply or compression system, mechanical defect. No ignition sparks. 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. Cylinder bottom gasket defective, crankshaft seals damaged, cylinder or piston rings defective or improper sealing of spark plug. Mechanical fault Starter not engaging. Broken starter spring, broken parts inside of the engine. Warm start problems - Tank lled. Ignition sparks. Carburetor contaminated, have it cleaned. Engine starts but dies Fuel supply Tank lled. Incorrect idling adjustment, carburetor contaminated. Fuel tank vent defective, fuel supply line interrupted, cable or STOP-switch faulty. Insufcient performance Several systems may simultaneously be affected Engine idling poor. Air lter contaminated, carburetor con- taminated, mufer clogged, exhaust duct in the cylinder clogged. Interval of inspection and maintenance - Before operation After fuelling Daily (10h) 50h 200h 600h or 2 years whichever earlier Before storage Engine oil Inspect / rell - - - - - - Replace - - - (Note1)

Adjustment of idling speed Inspect / adjust -

Fuel pipe Inspect - -

Oil tube Inspect - - - - (Note2)

Valve clearance (intake valve and exhaust valve) Inspect / adjust - - - - (Note2)

Carburetor Drain fuel - - - - - - (Note3) Note1: Perform initial replacement after 20h operation. Note2: For inspection, request Authorized Service Agent or a machine shop. Note3: After emptying the fuel tank, continue to run the engine and drain fuel in the carburetor. 16 ENGLISHTROUBLESHOOTING Before asking for repairs, conduct your own inspection rst. If you nd a problem that is not explained in the manual, do not attempt to dismantle the machine. Instead, ask Dolmar/Makita Authorized Service Centers, always using Dolmar/Makita replacement parts for repairs. State of abnormality Probable cause (malfunction) Remedy Engine does not start. Failure to operate primer pump. Push 7 to 10 times. Low pulling speed of starter rope. Pull strongly. Lack of fuel. Feed fuel. Clogged fuel lter. Clean the fuel lter. Bent fuel tube. Straighten the fuel tube. Deteriorated fuel. Deteriorated fuel makes starting more difcult. Replace with new one. (Recommended replacement: 1 month) Excessive suction of fuel. Set throttle lever from medium speed to high speed, and pull starter handle until engine starts. If engine will not start still, remove spark plug, make electrode dry, and reassemble them as they originally are. Then, start as specied. Detached plug cap. Attach securely. Contaminated spark plug. Clean the spark plug. Abnormal clearance of spark plug. Adjust clearance. Other abnormality of spark plug. Replace the spark plug. Abnormal carburetor. Ask our authorized service center to inspect and repair it. Cannot pull the starter knob. Ask our authorized service center to inspect and repair it. Engine internal parts problem. Ask our authorized service center to inspect and repair it. Engine stops soon. Engine speed does not increase. Insufcient warm-up. Perform warm-up operation. Choke lever is set to “CLOSE” although engine is warmed up. Set to “OPEN”. Clogged fuel lter. Clean the fuel lter. Contaminated or clogged air cleaner. Clean the air lter. Detached control cable. Attach the control cable securely. Engine internal parts problem. Ask our authorized service center to inspect and repair it. Throttle does not return to idling speed. Inproper throttle valve position. Reposition the control cable. Adjust the throttle valve position by turning the cable adjusting bolt. Engine does not stop. Run engine at idling, and set choke lever to “CLOSE”. Detached connector. Attach the connector securely. Abnormal electric system. Ask our authorized service center to inspect and repair it. 17 ENGLISHFRANÇAIS (Instructions originales)

WAARSCHUWING: BRANDBARE STOFFEN STRENG