makita RST250 Brush Cutter Instruction Manual

: June 16, 2024
: Makita

makita RST250 Brush Cutter

makita-RST250-Brush-Cutter-product

Product Information

The product is a user-friendly device that offers a wide range of features and functionalities. It is designed to provide convenience and efficiency in various tasks. With its sleek design and durable build, it is built to last and withstand everyday use.

Specifications

Model: RST250
Dimensions: 1,490mm x 300mm x 485mm
Weight: 4.2kg (9.2lbs) without blade, harness and fuel

Frequently Asked Questions

Q: How do I update the software?
- A: To update the software, go to the Settings menu and look for the “Software Update” option. Follow the on-screen instructions to check for updates and install them if available.
Q: Can I connect external devices to this product?
- A: Yes, you can connect external devices such as USB drives or headphones to this product using the provided ports. Refer to the user manual for specific instructions on connecting and using external devices.
Q: How do I reset the device to factory settings?
- A: To reset the device to factory settings, go to the Settings menu and look for the “Reset” or “Factory Reset” option. Select the option and follow the on-screen instructions to initiate the reset process. Keep in mind that this will erase all data and settings on the device, so make sure to back up any important information before proceeding.

Models

makita-RST250-Brush-Cutter-fig-1

Important

Read this instruction manual carefully before putting the brush cutter or grass trimmer into operation and strictly observe the safety regulations!
Preserve instruction manual carefully!

Thank you very much for purchasing the MAKITA Brush Cutter or Grass Trimmer. We are pleased to recommend to you the MAKITA Brush Cutter or Grass Trimmer which is the result of a long development programme and many years of knowledge and experience. Please read the booklet that refers to in detail the various points that will demonstrate its outstanding performance. This will assist you to obtain the best possible result from your MAKITA Brush Cutter or Grass Trimmer.

Symbols

You will note the following symbols when reading the instruction manual.

makita-RST250-Brush-Cutter-fig-2

SAFETY INSTRUCTIONS

General Instructions

To ensure correct operation, the user has to read this instruction manual to make himself familiar with the handling of the brush cutter or grass trimmer. Users insufficiently informed will risk danger to themselves as well as others due to improper handling.
It is recommended only to lend the brush cutter to people who have proven to be experienced with brush cutters or grass trimmers. Always hand over the instruction manual.
First users should ask the dealer for basic instructions to familiarise oneself with the handling of an engine powered cutter.
Children and young persons aged under 18 years must not be al- lowed to operate the brush cutter or grass trimmer. Persons over the age of 16 years may however use the device for the purpose of being trained only whilst under supervision of a qualified trainer.
Use brush cutters or grass trimmers always with the utmost care and attention.
Operate the brush cutter or grass trimmer only if you are in good physical condition. Perform all work calmly and carefully. The user has to accept liability for others.
Never use the brush cutter or grass trimmer after consumption of alcohol or drugs.

Personal protective equipment

The clothing worn should be functional and appropriate, i.e. it should be tight-fitting but not cause hindrance. Do not wear either jewelry or clothing which could become enlangled with brushes 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 of the brush cutter or grass trimmer.
Always wear a helmet when working in the forest. 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 flying splinters and stones. During operation of the brush cutter or grass timmer 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 flying stones and splinters. We strongly recommend that the user wear work overalls.
Special gloves (5) made of thick leather are part of the prescribed equipment and must always be worn during operation of the brush cutter or grass trimmer.
When using the brush cutter or grass trimmer, always wear sturdy shoes (6) with a non-slip sole. This protects against injuries and ensures a good footing.

Starting up the brush cutter or grass trimmer

Please make sure that there are no children other people within a working range of 15 meters also pay attention to any animals in the working vicinity.
Before use always check that the brush cutter or grass trimmer is safe for operation:
- Check the security of the cutting tool, the throttle lever for easy action and check for proper functioning of the throttle lever lock.
- Rotation of the cutting tool during idling speed is not allowed.
- Check for clean and dry handles and test the function of the start/stop switch.
Start the brush cutter or grass trimmer only in accordance with the instruction. Do not use any other methods for starting the engine.
Use the brush cutter or grass trimmer and the tools only for such applications as specified.
Start the brush cutter or grass trimmer engine only, 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 tool has no contact with hard objects such as branches, stones etc.
The engine is to be switched off immediately in case of any engine problems.
Should the cutting tool hit stones or other hard objects, immediately switch off the engine and inspect the cutting tool.
Inspect the cutting tool at short regular intervals for damage (detection of hairline cracks by means of tapping – noise test).
Operate the brush cutter or grass trimmer only with the shoulder strap attached which is to be suitably adjusted before putting the brush cutter or grass trimmer into operation. It is essential to adjust the houlder strap according to the user’s size to prevent fatigue occurring during use.
Never hold the cutter with one hand during use.
Operate the brush cutter or grass trimmer 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 brush cutter or grass trimmer unattended, and place it in a safe location to prevent danger to others or damage to the machine.
Never put the hot brush cutter or grass trimmer onto dry grass or onto any combustible materials.
The cutting tool has to be equipped with it’s appropriate guard. Never run the cutter without this guard.
All protective installations and guards supplied with the machine must be used during operation.
Never operate the engine with faulty exhaust muffler.
Shut off the engine during transport.
During transport over long distances the tool protection included with the equipment must always be used.
Ensure safe position of the brush cutter or grass trimmer during car transportation to avoid fuel leakage.
When despatching the brush cutter or grass trimmer, ensure that the fuel tank is completely empty.

Refuelling

Shut off the engine during refuelling, keep away from naked flames and do not smoke.
Avoid skin contact with mineral oil products. Do not inhale fuel vapor. Always wear protective gloves during refuelling. 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 brush cutter or grass 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 (a danger to life).
Inspect the fuel cap at regular intervals making sure that it can be securely fastened.
Carefully tighten the locking screw of the fuel tank. Change location to start the engine (at least 3 meters away from the place of refuelling).
Never refuel in closed rooms. Fuel vapors accumulate at ground level (risk of explosions).
Only transport and store fuel in licensed containers. Make sure the fuel stored is not accessible to children.

Method of operation

Only use the brush cutter or grass trimmer 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 shoulder height.
Never stand on a ladder and run the brush cutter or grass timmer.
Never climb up into trees to perform cutting operation with the brush cutter or grass trimmer.
Never work on unstable surfaces.
Remove sand, stones, nails etc. found within the working range. Foreign particles may damage the cutting tool and can cause dangerous kickbacks.
Before commencing cutting, the cutting tool must have reached full working speed.

Kickback

When operating the brush cutter, uncontrolled kickback may occur.
This is particularly the case when attempting to cut within a blade segment between 12 and 2 o’clock.
Never apply this segment of the brush cutter to solids, such as bushes and trees, etc., having a diameter in excess of 3 cm.
The brush cutter will then be deflected at great force with the attendent risk of injuries.
Never apply the brush cutter within a segment between 12 and 2 o’clock.

Kickback prevention

To avoid kickbacks, observe the following:

Operation within a blade segment between 12 and 2 o’clock presents positive hazards, especially when using metal cutting tools.
Cutting operations within a blade segment between 11 and 12 o’clock, and between 2 and 5 o’clock, must only be performed by trained and experienced operators, and then only at their own risk.
Easy cutting with almost no kickback is possible within a blade segment between 8 and 11 o’clock.

Cutting Tools

Employ only the correct cutting tool for the job in hand.

Nylon cutting head:

Exclusively designed for cutting along wall, fences, grass edges, trees, posts etc. (supplementing the grass mower).

Star blade:

For cutting thick materials, such as weed, high grass, bushes, shrubs, underwood, thicket etc. (max. 2 cm dia. thickness). Perform this cutting work by swinging the brush cutter evenly in half-circles from right to left (similar to using a scythe).

NOTE

For RST250, swing the machine from left to right to perform this cutting work.

Maintenance instructions

The condition of the cutter, in particular of the cutting tool of the protective devices and also of the shoulder strap must be checked before commencing work. Particular attention is to be paid to the cutting blades which must be correctly sharpened.
Turn off the engine and remove spark plug connector when replacing or sharpening cutting tools, and also when cleaning the cutter or cutting tool.
Never straighten or weld damaged cutting tools.
Operate the brush cutter or grass trimmer with as little noise and contamination as possible. In particular check the correct setting of the carburetor.
Clean the brush cutter or grass trimmer at regular intervals and check that all screws and nuts are well tightened.
Never service or stone the brush cutter or grass trimmer in the vicinity of naked flames.
Always store the brush cutter or grass trimmer 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 modifications on the brush cutter or grass trimmer as this will endanger your safely. 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 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 tools and fixing devices of cutting tools, or accessories.

First aid

makita-RST250-Brush-Cutter-fig-13

In case of accident make sure that a first-aid box is available in the vicinity of the cutting operations. Immediately replace any item taken from the first 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

Packaging

The MAKITA brush cutter or grass trimmer will be delivered in two protective cardboard boxes to prevent transport damage.
Cardboard is a basic raw material and is therefore consequently reuseable or suitable for recycling (waste paper recycling).

EC-DECLARATION OF CONFORMITY

CE

The undersigned, Yasuhiko Kanzaki, authorized by Makil S.A. Head office, 2, Allee des Performaces, Zone Industi Richardets, (B.P.119) 93162 Noisy Le Grand Cedex. Franc that the
Brush cutter or Grass trimmer, Model RBC220, RE RBC221. RBC251, RST250, manufactured by Robin.

is in compliance with the following standards or stan documents,

prEN31806 May 1994
Noisy Le Grand Cedex, 15 November 1994

This declaration only applies to machines which are in col with CEN standard

Technical data

Technical data RBC220, RBC221

makita-RST250-Brush-Cutter-fig-16

The data take equally into account the idling and racing or wide open slottle speed operating modes.
Some machines with U handle are not in compliance with CEN standard:
- Machines with Loop handle are not in compliance with CEN standard.
- Machines with J handle are in compliance with CEN standard.
- (CE label is put on machines with are in compliance with CEN standard).

Technical data RBC250, RBC251, RST250

makita-RST250-Brush-Cutter-fig-17

The data take equally into account the idling and racing or wide open slottle speed operating modes.
Some machines with U handle are not in compliance with CEN standard.
- Machines with Loop handle are not in compliance with CEN standard.
- Machines with J handle are in compliance with CEN standard.
- (CE label is put on machines with are in compliance with CEN standard).

DESIGNATION OF PARTS

makita-RST250-Brush-Cutter-fig-18 makita-RST250
-Brush-Cutter-fig-19

DESIGNATION OF PARTS

Fuel Tank
Recoil Starter
Air Cleaner
ON-OFF Switch
Spark Plug
Muffler
Holder Case
Rear Grip
Hanger
Handle
Throttle Lever
Throttle Cable
Drive Shaft
Protector
Gear Case / Head Case
Handle Joint
Brush Blade
Nylon Cutting Head
Waist Pad
Fuel Tank Cap
Starter Knob
Primer Pump
Choke Lever
Exhaust Pipe
Shoulder Strap

Assembly Instructions

Assembling of engine and drive shaft

CAUTION: Before doing any work on the brush cutter or the grass trimmer, always switch off the motor and pull the spark plug connector off the spark plug. Always wear protective gloves!
CAUTION: Start the brush cutter or the grass trimmer only after having assembled it completly.

makita-RST250-Brush-Cutter-fig-21

Insert the nuts M5 (1) into the hex holes in the holder case. Insert the screws M5 x 30 (2) through the opposite holes and semi-tighten the screws M5 x 30.
Insert the nipple (3) of the throttle wire through the square hole. in the grip until it fits into the square hole in the moving part which is inside the grip. It should move when the throttle lever is squeezed
Insert the shaft into the holder case fully untill the grip end reaches the holder case while passing the throttle wire and the switch cords, (4) through the slot in the holder case.

NOTE: Match the square drive of the inner shaft to the square hole inside the holder case by slightly rotating the drive shaft or the support washer on the head case, and you can insert the drive shaft into the holder case smoothly. Be cautions not to allow the switch cords to be pinched between the holder case and the grip end.

Match the hole in the holder case to the hole in the inner shaft and insert the screw M5 x 8 through the holes. Then tighten the screw M5 x 8 and the screws M5 x 30 (5).
- NOTE: Squeeze the throttle lever to make sure that the throttle wire moves smoothly.
Connect the switch cords to the two cords from the engine by inserting one into the other. Insert them through the holes in the cover (6).

NOTE

For RBC220, RBC221, RBC250 and RBC251, the engine and drive shaft are installed on the machine at factory. Install the throttle wire and ignition wire only.

For machines with U handle

makita-RST250-Brush-Cutter-fig-23

Connect the throttle wire and firmly close the cable joint.
Squeeze the throttle lever to make sure that the throttle wire moves smoothly.
Connect the switch cords to the two cords from the engine by inserting one into the other.
Wrap the waist pad around the drive shaft so that the hanger (7) will protrude through the slit in the waist pad and the throttle wire and the cords (9) will also be wrapped under the waist pad (8)
Insert the bullet connectors (10) through the holes in the cover (11)

For machine with J handle

Always pass the throttle wire through the hole in the undersic of the rear grip (12).

NOTE: Loose throttle wire will disturb you in operation. If it is caught ar pulled by something, engine rpm will increase unexpectedly.

makita-RST250-Brush-Cutter-fig-26

Connect the throttle wire and firmly close the cable joint.
Squeeze the throttle lever to make sure that the throttle wire smoothly.
Connect the switch cords to the two cords from the engir inserting one into the other.
Insert the bullet connectors (10) through the holes in the cover

Mounting of handle

For machines with U handle

makita-RST250-Brush-Cutter-fig-28

Loosen the handle installation bolts (12).
Insert the handle into the handle joint (13) fully.
After making sure that the handle is installed properly, tighte installation bolts (12) to secure the handle.
Secure the throttle wire with the clip wire (14) as shown in the for easy operation.

For machine with J handle

makita-RST250-Brush-Cutter-fig-29

Match the protrusions on the handle joint (17) to the holes in the underside of the handle (16). Tighten the four socket head bolts M5 (15) evenly to secure the handle.
Secure the throttle wire with the clip wire (20) as shown in the figure for easy operation.

For machine with Loop handle

Attach the handle to the shaft.
Install the handle joint (22) on the handle. Insert the installation bolt M6 x 45 (23) through the hole in the handle. Semitighten the installation bolt M6 x 45 (23).
Adjust the handle to the desired position over 200 mm away from the rear grip (24) and tighten the installation bolt M6 x 45 (23)

Mounting of protector

To meet the applicable safety provisions, only the tool/protector combination as indicated in the table must be used

Be sure to use genuine MAKITA cutter blade or nyion cutting head.

* The cutter blade must be well polished, free of cracks or breakage.

If the cutter blade hits against a stone during operation, stop the engine and check the blade immediately.
Polish or replace the cutter blade every three hours of operation.

For RBC220, RBC250

The outside diameter of the cutter blade must be 230 mm (9-1/16″).
Never use any blades surpassing 230 mm (9-1/16″‘) in outside diameter.

makita-RST250-Brush-Cutter-fig-32

CAUTION

The appropriate protector must always be installed, for your own safety and in order to comply with accident-prevention regulations.
Operation of the equipment without the guard being in place in not permitted.

For RBC220, RBC250, RBC221, RBC251

Install the clamp (3) on the drive shaft so that the projection of the clamp (3) is inserted into the opening between the gear case (1) and the shaft.
Secure the protector (4) with the installation bolts M6 x 30 (2).

For RST250

Attach the protector (7) to the shaft.
Insert the nut M6 (6) into the hex hole in the protector (7).
Secure the protector with the installation bolt M6 x 45 (5).

NOTE: Do not tighten the installation bolt M6 x 45 (5) excessively.

Mounting of the cutter blade

Mounting of cutter blade or nylon cutting head

Turn the machine upside down, and you can replace the cutter blade or the nylon cutting head easily.

For RBC220, RBC221, RBC250, RBC251

Insert the hex wrench through the hole in the gear case and total the support washer (9) until it is locked with the hex wrench (cutter the shaft is locked).
Loosen the nut (left-handed) with the socket wrench and remove the nut (7), and tightening washer (8).

For RBC220, RBC250

Mount the cutter blade onto the shaft so that the guide of the support washer fits in the arbor hole in the cutter blade. Installation the tightening washer and secure the cutter blade with the number (Tightening torque: 130 – 230 kg-cm)

NOTE

Always wear groves when handling the cutter blade.

For RBC221, RBC251

Screw the nylon cutting head onto the shaft.

NOTE

The tightening washer, and nut are not necessary for mounting the nylon cutting head.

For RST250

Insert the screwdriver provided through the hole in the head cas and rotate the support washer until it is locked with the screwdrive (or the shaft is locked).
Screw the nylon cutting head onto the shaft.

Fuel / Refuelling

Handling fuel

Utmost care is required when handling fuel. Fuel may contain substances similar to solvents. Refuel either in a well ventilated room or outdoors. Do not inhale fuel vapors, avoid any contact of fuel or oil with your skin. Mineral oil products degrease your skin. If your skin comes in contact with these substances repeatedly and for an extended period of time, it will desiccale. Various skin deseases may result. In addition, allergic reactions are known to occur. Eyes can be irritated by contact with oil. If oil comes into your eyes, immediately wash them with clear water. If your eyes are still irritated, see a doctor immediately!

Fuel and oil mixture

The engine of the brush cutter or grass trimmer is a high-efficiency two- stroke engine. It is run with a mixture of fuel and two-stroke engine oil.

The engine is designed for unleaded regular fuel with a min, oclane value of 91 RON. In case no such fuel is available, you can use fuel with a higher octane value. This will not affect the engine, but my cause poor operating behaviour. A similar situation will arise from the use of leaded fuel. To obtain optimum engine operation and to protect your health and the environment, only unleaded fuel should be used!

For lubricating the engine use a two-stroke engine oil (quality grade: TC-3), which is added to the fuel. The engine has been designed for use of MAKITA two-stroke engine oil and a mixture ratio of only 50: 1 to protect the environment. In addition, a long service life and a reliable operation with a minimum emission of exhaust gases is guaranteed.

It is absolutely essential to observe a mixture ratio of 50: 1 (MAKITA 2-stroke engine oil) as otherwisse reliable function of the brush cutter or grass trimmer cannot be guaranteed.

The correct mixture ratio

Mix 50 parts gasoline with 1 part MAKITA 2-stroke engine oil (see table on left).

NOTE

For preparing the fuel-oil mixture first mix the entire oil quantity with half of the fuel required, then add the remaining fuel. Thoroughly shake the mixture before filling it into the brush cutter or grass trimmer tank. It is not wise to add more engine oil than specified to ensure safe operation. This will only result in a higher production of combustion residues which will pollute the environment and clog the exhaust channel in the cylinder as well as the muffler. In addition, the fuel consumption will rise and the performance will decrease.

Refuelling

The engine must be switched off!

Thoroughly clean the area around the plugs, to prevent dirt from getting into the fuel tank.
Unscrew the plug and fill the tank with fuel as the case may be.
Tightly screw on the plug.
Clean screw plug and tank after refuelling!

Storage of fuel

Fuel cannot be stored for an unlimited period of time.
Purchase only the quantity required for a 4 week operating period.
Only use approved fuel storage containers.

Correct handling of machine

makita-RST250-Brush-Cutter-fig-43

Attachment of shoulder strap
- Adjust the strap length so that the cutter blade or the nylon cutting head will be kept parallel with the ground.
Detachment
- In an emergency, pull the release belt (1) strongly upward, you can detach the machine from you. Be extremely cautions maintain control of the machine at this time. Do not allow machine to be deflected toward you or any one in the work vicinity

WARNING: Failure to maintain complete control of the machine at all could result in serious bodily injury or DETAIL.

Putting into operation

Observe the applicable accident prevention regulations!

Starting

Move at least 3 m away from the place of refuelling. Place the brush cutter or grass trimmer on a clear piece of ground taking ca that the cutting tool does not come into contact with the ground or any other objects.

Cold start

For machine with U Handle or J Handle

Push the stop switch (1) in the direction shown by the arrow.
Grasp the handle (hand pressure activates the safety lock-off lev (5)).
Press the throttle lever (6) and hold it down.
Press the lock button (4) and release the throttle lever, and the release the lock button (the lock button holds the throttle lever the start-up poition).

For machine with loop handle

Push the stop switch (9) in the direction shown by the arrow.
Squeeze the throttle lever (7) fully.
Hook the lock (14) to the notch (13) in the throttle lever while releasing the throttle lever.
First place the machine on the ground.
Give a gentle push on the primer pump (12) repeatedly (7 – 10 times) until fuel comes into the primer pump.
Move the choke lever (11) to the top position ( ).
Firmly hold the holder case by your left hand as illustrated
Slowly withdraw the starter grip until resistance is felt and continue with a smart pull.
Do not pull out the starter rope to its full extent and do not allow the starter handle to be retracted without control, but ensure that it is retracted slowly.
Repeat the starting operation until initial ignitions are heard.
Depress the choke lever ( ) and pull the starter rope again until the engine starts.
As soon as the engine starts, immediately tap and release the throttle, thus releasing the half-throttle lock so that the engine can run in idle.
Run the engine for approximately one minute at a moderate speed before applying full throttle.

Caution during operation

If the throttle lever is opened fully in a no-load operation, the engine rotation is increased to 10,000 rpm or more. Never operate the engine at a higher speed than required and at an approximate speed of 6,000 – 8,000 rpm.

makita-RST250-Brush-Cutter-fig-50

Starting the warm engine
- As described above except without moving the choke lever (the choke lever remains in the down position ( ).
Stopping
- Release the throttle lever (6), (7) fully, and when the engine rpm has lowered, push the stop switch (1), (9) to “STOP” position. Engine will stop.

Idle adjustment

The cutter blade or the nylon cutting head should not run when the throttle lever is fully released. If necessary, adjust the idle rpm using the idle adjusting screw.

Checking the idling speed

Idle speed should be set to 2,600 rpm.
If necessary correct it by means of the idle screw (the blade or the string cutting head must not turn when the engine is on idle).
Screwing in of the screw (1) will cause an increase in the engine speed, whereas backing off of the screw will reduce the engine speed.

Resharpening the cutting tool

CAUTION: The cutting tools mentioned below must only be resharpened by an authorized facility. Manual resharpening will result in imbalances of the cutting tool causing vibrations and damage to the equipment.

Star blade
- An expart resharpening and balancing service is provided by Authorized Service Agent.

NOTE: To increase the service life of the star blade it may be turned over once until both cutting edges have become blunt.

Servicing Instructions

CAUTION

Before doing any work on the brush cutter or grass trimmer, always switch off the motor and pull the plug cap off the spark plug (see “‘Checkup of spark plug”).
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.

Daily checkup and maintenance

Before operation, check the machine for loose screws or missing parts. Pay particular attention to the tightness of the cutter blade.
Before operation, always check for clogging of the cooling air passage and the cylinder fins. Clean them if necessary.
Perform the following work daily after use:
Clean the air her. then to gras tier extremely ays inductions, c dam the filter the several times a day.
- Check the blade or the nylon cutting head for damage and make sure it is firmly mounted.
- Check that there is sufficient difference between idling and engagement speed to ensure that the cutting tool 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 stop switch, the lock-off lever, the throttle lever, and the lock button.

Cleaning of air cleaner

makita-RST250-Brush-Cutter-fig-53

Unscrew screw (1).
Remove the air cleaner cover.
Push the choke lever (2) up (arrow) to prevent dirt particles from entering the carburettor.
Remove the sponge element (3). Wash it with lukewarm water and then dry it thoroughly.
After cleaning the air cleaner, install the air cleaner cover (4) and tighten the screw (1) to secure it.

NOTE

If there is excessive dust or dirt adhering to the air cleaner, clean it every day.
A clogged air cleaner may make it difficult or impossible to start the engine or increase the engine rotational speed.

Checkup of 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 0.6 to 0.7 mm (0.024″‘ – 0.028″‘). If the gap is too wide or too narrow, adjust it. If the spark plug is clogged with carbon or fouled clean it. Thoroughly or replace it.

CAUTION: Never touch the spark plug connector while engine is running. (changer of high voltage electric shock)

Supply of grease to gear case

makita-RST250-Brush-Cutter-fig-55

Supply grease (Shell alvania No. 3 or equivalent) to the gear case through the grease hole (5) every 30 hours. (Genuine MAKITA grease may be purchased from your MAKITA dealer.)

Suction head in the fuel tank

The felt filter (1) of the suction head is used to filter the fuel required by the Carburetor.
A periodical visual inspection of the felt filter 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.
Insufficient fuel supply can result in the admissible maximum speed being exceeded. It is therefore important to replace the felt filter at least quarterly to ensure a satisfactory fuel supply to the Carburetor.

Cleaning of muffler exhaust port

Check of muffer exhaust port (2) regularity.
If it is clogged by carbon deposits, carefully scratch the deposits out with a suitable tool.

Any maintenance or adjustment work that has not been included and described in this manual is only to be performed by Authorized Service agent.

Storage

When keep the machine in storage for a long time, drain fuel from the fuel tank and carburettor, as follows: Drain all fuel from the fuel tank.
Remove the spark plug and addition a few drops of oil into the spark plug hole. Then, pull the starter gently confirm that oil film covers the engine inside and tighten the spark plug.
Clear dirt or dust from the cutter blade and outside of engine, wipe them with an oil-immersed cloth and keep the machine at a place as dry as possible.

Maintenance schedule

makita-RST250-Brush-Cutter-fig-59