Instruction Manual

Read this instruction manual carefully before putting the brushcutter into operation and strictly observe the safety regulations! Keep this Instruction Manual!

Important:

MS-260 U MS-330 U MS-430 U
MS-230 C MS-260 C MS-330 C

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We trust that you will be a satisfied customer. By choosing a DOLMAR you have chosen one of the most advanced brushcutters.
Thank you for choosing a DOLMAR product!

Table of contents

With their two-stroke gasoline engines the brushcutters can be used anywhere, and with their fuel pump (primer) they are unusually easy to start. Theyre ideal for yardwork and greens keeping and especially suitable for occasional use. They offer the latest technology, ergonomic design and high ease of use at a reasonable price. To ensure your own safety and to get the maximum performance out of your DOLMAR brushcutter, we urge you to read this instruction manual carefully before putting the brushcutter into operation and to strictly observe all of the safety regulations! Failure to observe these precautions can lead to severe injury or death!
EC declaration of conformity.. 2 Packing... 2 Delivery inventory... 3 Explanation of symbols.. 3 Safety precautions General precautions... 4 Personal protective equipment.. 4 Handling fuels / Refuelling..4-5 Putting into operation... 5 Kickback... 6 Working behavior / Method of working.. 6 Applications for cutting tools.. 6 Transport and Storage..6-7 Maintenance... 7 First Aid... 7 Technical data... 8 Components.. 8 Putting into operation Handle installation, MS-260/330/430 U.. 9 Handle installation, MS-230/260/330 C.. 9 Mounting the cutter guard.. 10 Mounting the 4-tooth star blade.. 11 Installing the trimmer head.. 11 Adjusting the line.. 12 Replacing the line... 12 Replacing the line knife.. 12 Fuel mixture / Refuelling.. 13 Putting on the harness.. 14 Balancing the brushcutter... 14 Quick-release buckle... 14 Start engine..14-15 Idle adjustment.. 15 Repair and maintenance work Instructions for maintenance.. 16 Sharpening of cutting tools.. 16 Cleaning the air filter.. 17 Replacing and Inspecting the spark plug. 17 Lubricating the gear box.. 18 Suction head in the fuel tank... 18 Cleaning the muffler opening.. 18 Service and maintenance... 18 Trouble shooting... 18 Extract from the spare part list.. 19 Service, spare parts and guarantee.19-20 Notes.... 21 Service centres (see enclosure)
EU Conformity Declaration
The undersigned, Shigeharu Kominami and Rainer Bergfeld, as authorized by DOLMAR GmbH, declare that the DOLMAR machines, Type: MS-230 C (351), 260 C (352), 330 C (353), MS-260 U (352), 330 U (353), 430 U (354) manufactured by DOLMAR GmbH, Jenfelder Str. 38, 22045 Hamburg, Germany, conforms to the basic safety and health requirements of the applicable EU guidelines: EU Machine guideline 98/37/ EG, EU EMC guideline 89/336/ EWG (modified by 91/263/ EWG, 92/31/ EWG and 93/68/ EWG), Noise emission 2000/14/EG. The most important standards applied to properly meet the requirements of the above EU guidelines were: EN 11806, EN 14982, EN 61000-4-2, EN 61000-4-3. The conformity assessment procedure 2000/14/EG was performed per Annex V.
MS-230 C: The measured sound power level is 110 db(A), the guaranteed sound power level is 112 db(A). MS-260 C: The measured sound power level is 110.7 db(A), the guaranteed sound power level is 112 db(A).
MS-260 U: The measured sound power level is 102.8 db(A), the guaranteed sound power level is 105 db(A). MS-330 C: The measured sound power level is 112.3 db(A), the guaranteed sound power level is 115 db(A).
MS-330 U: The measured sound power level is 103.6 db(A), the guaranteed sound power level is 105 db(A). MS-430 U: The measured sound power level is 104.7 db(A), the guaranteed sound power level is 107 db(A). Hamburg, 22.2. 2005 For DOLMAR GmbH

Packing

Your DOLMAR brushcutter comes in a cardboard box to protect it from shipping damage. Cardboard is a raw material. We encourage you to reuse the box or recycle it (waste paper).
Shigeharu Kominami Rainer Bergfeld Managing Director Managing Director

Delivery inventory

1. Brushcutter 2. Handle (version depends on model) 3. Harness 4. Cable ties (only with the MS-260/330/430 U) 5. Combination tool, AF 17/19 6.Allen key, 4 mm 7.Allen key, 5 mm 8.Wrench, 8/10 9.Guard (cutting attachment guard) 10. Cutting tool (MS-260/330/430 U = 4-tooth star blade, MS-230/260/330 C = 2-line trimmer head) 11. Tool protection (MS-260/330/430 U only) 12. Guard extension - Instruction Manual (not shown)

Shown: MS-260 U

If one of these parts is missing when you unpack the brushcutter, contact your dealer!

Explanation of symbols

You will notice the following symbols on the brushcutter and in the instruction manual. Read the instruction manual and follow all warnings and safety instructions! Particular care and caution! Forbidden! Wear protective gloves!

Maximum tool rpm

Start engine
Wear safety shoes! Wear head, eye, face and hearingprotection! The distance between the machine and bystanders shall be at least 50 feet! DANGER: Beware of thrown objects! Do not use metal blades!

Stop engine! No smoking!

No open flame!

Fuel and oil mixture

First aid Recycling
Do not use saw blades! CAUTION: Kickback! (blade thrust) CE-Marking

SAFETY PRECAUTIONS

General precautions
Proper use: These power brushcutters are intended for cutting grass or heavy weeds, with the appropriate and permissible cutting tools. A brushcutter may be operated only by one person, and only out of doors! Improper use: The cutting tools permissible for this brushcutter must not be used to cut heavier material such as shrubs, bushes, heavy growth, or thickets. Impermissible users: Persons who are unfamiliar with this Instruction Manual, minors, and persons under the influence of alcohol, drugs or medication must not operate this tool. To ensure correct operation, the user has to read this instruction manual to make himself familiar with the handling of the brushcutter. Insufficiently informed users will risk danger to themselves as well as others due to improper handling (1). - It is recommended only to lend the brushcutter to people who have experience with brushcutters. When lending the brushcutter to someone else, give him this Instruction Manual as well. - First-time users should ask their dealer for basic instructions so that they can familiarize themselves with the basic handling of gasoline-powered brushcutting. - Children and persons under the age of 18 must not be allowed to operate the brushcutter. Exceptions may be made for persons over 16 for training purposes under the supervision of a qualified trainer. - Always use brushcutters with the utmost care and attention. - Operate the brushcutter only if you are in good physical condition. Perform all work calmly and carefully. The user must accept liability for others. - Never use the brushcutter after consumption of alcohol, drugs or medication (2). should not come in contact with mineral oil products. Always wear protective gloves when refuelling. Frequently clean and change protective clothes. Do not breathe in fuel vapors. Inhalation of fuel vapours can be hazardous to your health. - Before refuelling the brushcutter make sure it is on its side in a stabile position. - Do not spill fuel or oil. When you have spilt fuel or oil immediately clean the brushcutter. Fuel should not come in contact with clothes. If your clothes come in contact with fuel, change them at once.

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 jewellery or clothing which could become entangled with bushes or shrubs. Secure hair so it is above shoulder level. If you have long hair, always wear a hair net! - 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 brushcutter: - It is recommended to wear a protective helmet; it is imperative when working in forests. The protective helmet (1) should be checked at regular intervals for damage and must be replaced after 5 years at the latest. Use only approved protective helmets. - The helmet face shield (2) protects your face from flying particles from the cut and other objects. To prevent eye injury, wear protective goggles in addition to the face shield. - Wear adequate noise protection equipment to avoid hearing impairment (ear muffs (3), ear plugs etc.). Octave brand analysis upon request. - The forestry safety jacket (4) is equipped with special red coloured shoulder parts. The arms and neck should always be protected by clothing. - The protective trousers (5) are made from a nylon fabric with 22 layers and protects against cuts. We strongly recommend its use. In any case, it is essential that a long pair of trousers made of tough material be worn during operation of the brushcutter. - Protective gloves (6) made of thick leather are part of the prescribed equipment and must always be worn during operation of the brushcutter. - Safety shoes or boots (7) fitted with anti-skid sole, steel toe caps and leg protection must always be used. Safety shoes equipped with a protective layer give protection against cuts and ensure a secure footing.
Handling fuels / Refuelling
- Stop the engine before refuelling. - Keep away from open flame or sparks and do not smoke while refuelling or mixing fuel. - Let the engine cool down before refuelling. - Fuel may contain substances similar to solvents. Eyes and skin
- Ensure that no fuel or chain oil oozes into the soil (environmental protection). Use an appropriate base. - Refuelling is not allowed in closed rooms. Fuel vapors will accumulate near the floor (explosion hazard). - Carefully tighten the locking screw of the fuel tank and inspect the fuel cap at regular intervals. - Change the place before starting the engine (at least 3 meters from the place of refuelling) (6). - Fuel cannot be stored for an unlimited period of time. Buy only as much as will be consumed in the near future. - Use only approved and marked containers for the transport and storage of fuel. Ensure children have no access to fuel. Do not work alone. Another person must be nearby in case of emergencies (within shouting distance). Children and other persons must remain more than 15 meters (50 feet) from the working area. Keep an eye out for animals as well (7). - Before use always check that the brushcutter is safe for operation: Make sure the cutting tool is securely installed. The throttle must automatically return to the off position when released, and the throttle lever lock must work properly. The cutting tool must not turn during idling. The handles should be clean and dry. The on/off switch must function properly. The guard must be undamaged and securely installed in the correct position. Otherwise you are in danger of injury! - Start the brushcutter only in accordance with the instructions. Do not use any other methods for starting the engine (8)! - Use this brushcutter and its cutting tools only for the uses they are intended for as specified in the documentation. - Start the brushcutter only after complete assembly and inspection. Operation of the device is only permitted after all the appropriate accessories are attached! - The cutting tool must be equipped with its appropriate guard. Never run the cutter without this guard! - The cutting tool must not turn during idling. If necessary adjust the idling speed. - Before starting, make sure that the cutting tool has no contact with hard objects such as branches, stones etc. - The engine must be switched off immediately if there are any noticeable changes in the behavior of the equipment. - 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 frequent intervals for damage (detect hairline cracks by means of tapping - noise test). Hairline cracks can occur in the region of the base of the teeth after long use. Damaged cutting tools and cutting tools with hairline cracks must not be used any longer under any circumstances. - Operate the brushcutter only with the shoulder strap attached, which is to be suitably adjusted before putting the brushcutter into operation. It is essential to adjust the shoulder strap according to the users size to prevent fatigue during use. Never hold the cutter with one hand during use. - When working with the brushcutter always hold it with both hands (9). Keep proper footing and balance at all times. - Operate the brushcutter in such a manner as to avoid inhalation of the exhaust gases. Do not start or operate the brushcutter in closed rooms (risk of gas poisoning). Carbon monoxide is an odorless gas. Work only in well-ventilated places. - When taking a break or leaving the brushcutter unattended, turn off the engine (10) and set the brushcutter down in such a way that there is no risk of injury to yourself or others. - Never put the hot brushcutter onto dry grass or onto any combustible materials. - Shut off the engine during transport or when moving on to a new location (10). - Never operate the engine with a faulty exhaust muffler.

3 meters (10 feet)

Putting into operation

Schematic drawing

15 meters (50 feet) 7
8 MS-230 C MS-260 C MS-330 C MS-260 U MS-330 U MS-430 U
Breaks Transport Refuelling Maintenance Tool Replacement

Kickback

During operation the brushcutter can kickback in an uncontrolled manner. This can happen when the cutting blade (4tooth star blade) comes into contact with hard objects such as stumps, fenceposts, tree trunks, woody brush or large rocks. This can fling the brushcutter to one side with great force and speed (injury hazard). To avoid kickback, observe the following:
- Remove foreign objects from the cutting area and be aware of plants and objects in the area. - The cutting tool must be turning at full speed before starting cuts.

11 Caution: Kickback!

- The danger of kickback is heightened in the darkened area (illustration), especially if using a metal cutting tool!
- Use the brushcutter only 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 your shoulder height. - Never stand on a ladder and run the brushcutter. - Never climb up into trees to perform cutting operations with the brushcutter. - Never work on unstable surfaces. - Make sure the cutting area is free of foreign objects such as stones and metal items. Foreign particles can rebound (danger of injury, 12), damage the cutting tool and cause dangerous kickbacks. - Before commencing cutting, the cutting tool must have reached full working speed.
Working behavior / Method of working
Applications for cutting tools

2-line trimmer head (13)

Employ only the correct cutting tool for the job in hand! Do not use tools for jobs they are not designed for. Only for cutting up against walls, fences, trees, posts etc. and at lawn edges (as an adjunct to a lawnmower). 4-tooth star blade (14) For cutting grass or heavy weeds. Perform this cutting work by swinging the brush cutter evenly in half-circles from left to right (15, similar to a scythe).

Transport

- When transporting the equipment or moving to another working location, the brushcutter must be switched off in order to avoid unintentionally starting the cutting tool. - Never transport the brushcutter when the cutting tool is in operation! - The tool protection included with the equipment must always be used if the brushcutter is transported over longer distances. - Ensure that the brushcutter is safely secured so that no fuel can run out before transporting it in a vehicle. Empty the fuel tank before transporting the brushcutter. - Before shipping the brushcutter, completely empty the fuel tank.

Storage

- The brushcutter must be safely stored in a dry room. Use the tool protection for metal cutting tools. Keep the brushcutter out of reach of children. - If the brushcutter is stored for a long period of time, it should be given a thorough maintenance check and a complete inspection at an authorized DOLMAR service centre.
- If the brushcutter is stored for a long period of time, the fuel tank should be completely emptied and the carburetor run dry. Fuels may only be stored for a limited period of time and could cause deposits to form in the tank or in the carburetor.
- Fuel remains in reserve canisters should be used for other engines or disposed of.

Maintenance

- Always make sure the brushcutter is in good working order before using it. This includes in particular the cutting tool, guard, harness and fuel system (check for leaks). Particular attention must be paid to the cutting blades, which must be correctly sharpened. CAUTION: Metal cutting tools must be sharpened only at an authorized service centre!
A tool which has been improperly sharpened can cause unbalance and thus considerable danger of injury. Apart from this, the equipment may be damaged due to vibrations.
- Replace cracked, bent, warped, damaged or dull cutting tools immediately. Never straighten or weld damaged cutting tools.
- When changing the cutting tool, cleaning the brushcutter and the cutting tool etc., it is essential to switch off the engine and pull the spark plug cap.

SERVICE

- Operate the brushcutter with as little noise and pollution as possible. In particular check the correct setting of the carburetor. - Clean the brushcutter at regular intervals and check that all screws and nuts are well tightened.

(MS-230 C, MS-260 C, MS-330 C)
- Take the bolts and nuts (C/4, 5) and grip bracket (C/7) from the enclosed pack. - Attach the handle retainer plate (C/7) with bolts (C/4) and nuts (C/5). Set the right distance between the throttle grip (C/8) and hand grip, and tighten screws (C/4). - Place grip (C/6) on shaft tube.
Installing the cutter guard
Important: Safety regulations and your own safety make it imperative to use the right cutter guard with a given cutting tool!
Warning: Use only the cutting tools shown here! It is not permitted to use other cutting tools as this can increase danger of accidents and cause damage to the equipment!
Tool/guard combinations for the MS-260 U / MS-330 U / MS-430 U

Cutting tool

4-tooth star blade: Part no. 010

Cutter guard

Part no. 101
Outside diameter: 230 mm (9"), arbour: 20.0 mm (4/5")
2-line trimmer head Part no. m Part no. m Part no. 070
Part no. 101 and Part no. 102
Install the guard extension
Tool/guard combinations for the MS-230 C / MS-260 C / MS-330 C
Install the guard extension Mounting the cutter guard
- Hook the hood (A/5) by the cutout (A/1) on the lug (A/2). - Insert and tighten bolt (A/3) and nut (A/4).
Mounting the guard extension for use with trimmer head. - See above for installation of the cutter guard. - Attach the guard extension (B/6) supplied with the brushcutter to the upper part of the cutter guard (A/5), bending it to fit the contour of the guard.
- Attach the trimmer line knife (B/7) to the guard extension (B/8) with the bolt (B/6). Note: If the trimmer line has been extended (see Adjusting the line) the trimmer line knife automatically cuts the line ends to the same length during use.
Mounting the 4-tooth star blade
(MS-260 U / MS-330 U / MS-430 U)
Always switch off the engine and disconnect the spark plug cap before mounting metal cutter blades! Wear protective gloves! - Remove floating disc (C/6) and thrust washer (C/5). - Insert the offset screwdriver 4 mm (C/1) through the winding guard and the locking disc into the opening (C/3) in the angular gear (block the winding gear). If necessary turn the mounting disc (C/3) slightly. - Position the blade (C/4), thrust washer (C/5) and finally the floating disc (C/6) as shown.
- Screw down the locknut (C/7) and tighten it by turning the combination wrench counter-clockwise.
- Unscrew the locknut (C/7) from the shaft by turning it clockwise. If necessary, block the angle gear (see below). Note: The locknut is provided with a left-hand thread!

Fuel mixture

AVOID SKIN AND EYE CONTACT!
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 vapours. Fuel vapours are poisonous and can be hazardous to your health. Avoid eye and skin contact with fuels and mineral oils. 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 desiccate. 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!
1000 cm3 (1 litre)20 cm325 cmcm3 (5 litres) 100 cmcmcm (10 litres) 200 cm 250 cm3
The brushcutter is powered by a highperformance twostroke engine. The engine runs on a mixture of gasoline and twostroke engine oil.
Fuels have a limited storage life. Fuel and fuel mixtures age. Therefore fuel and fuel mixtures, which have been stored for too long, can cause starting problems. Purchase only that amount of fuel, which will be consumed over the next few months. Store fuel safely in a dry place in approved containers only.

The Storage of Fuel

The engine was designed for regular leadfree gasoline with an octane number of at least 91 ROZ. If this is not available, higheroctane gasoline may be used. This will not damage the engine, but may impair engine performance.
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 engine lubrication use a two-stroke engine oil (JASO FC or ISO EGD quality grade). Add it to the fuel during refuelling. The engine was designed for use with a high performance two-stroke oil sold by DOLMAR, with a mixture ratio of 50:1. This will ensure long engine life and reliable operation with low exhaust emissions. DOLMAR highperformance twostroke engine oil is available in two different sizes: 1 liter part no. 107 part no. 106 Be careful and cautious when handling fuels. The engine must be switched off!

Refuelling

FOLLOW THE SAFETY PRECAUTIONS!

100 ml

In case DOLMAR high-performance two-stroke engine oil is not available, it is urgently recommended to use a mixture ratio of 40:1 with other two-stroke engine oils, as otherwise optimum operation of the engine cannot be guaranteed. Caution: Do not use ready-mixed fuel from petrol stations. Preparation of the correct mixture ratio: 50:1 When using DOLMAR high-performance two-stroke oil, i.e. 50 parts gasoline /1 part oil. 40:1 When using other brands, i.e. 40 parts gasoline / 1 part oil. Note:

- Move at least 3 meters (10 feet) away from where you filled the fuel tank.
- Make sure you have a good footing, and lay the brushcutter on the ground in such a way that the cutting tool is not touching the ground or anything else.

Cold start

- Prime the fuel pump (G/5) by pressing it several times until you can see fuel in the pump.
- Turn the choke lever (G/4) to the CHOKE (closed) position. - Hold the brushcutter with one hand as shown in Fig. E on page 14. - Pull the starter cable slowly until you feel resistance (piston is just before top dead centre).
- Actuate the half-throttle lock by depressing the safety lock (F/3), pressing in the throttle (F/1) and moving the combination switch (F/2) into the START position. Then release throttle (F/1) and then the combination switch (F/2).
- Now pull quickly and forcefully until you hear the first audible ignition (the engine will start briefly).
- Turn the choke lever (G/4) to the RUN (open) position and pull the starting handle again until the engine runs.
- Do not pull out the whole starter cable to its full extent and do not let the starter handle jump back, but let it slowly automatically rewind itself.
- Once the engine has started, press the throttle (F/1) all the way and release it again immediately. The half-throttle catch will come out and the engine will idle.

Warmstart

- If the engine is warmed up do not prime the fuel pump. - Do not turn the choke switch to the CHOKE (closed) position, but to RUN. - Move the combination switch (F/2) to the I position.

Stop engine

Move the combination switch (F/2) to the O position.

Idle adjustment

Important: The cutting tool must not rotate when the engine is idling! If it does, adjust the idle speed. - The appropriate cutting tool must be mounted. - Make sure the air filter is clean. - Let the engine run warm.
- Unscrew the adjustment screw (H/6) no more than 1/8 turn (counter-clockwise).
- Do not operate the throttle (F/1).
If the cutting tool does not stop, do NOT work with the brushcutter. Take it to a DOLMAR service centre!

- Repeat the procedure if the cutting tool still rotates during idling.
Repair and maintenance work
CAUTION: Before doing any work on the brushcutter, always switch off the motor and pull the plug cap off the spark plug. Always wear protective gloves! CAUTION: Start the brushcutter only after complete assembly and inspection!
Instructions for maintenance
For long life and troublefree operation of your brushcutter the maintenance work listed below must be carried out regularly. Failure to perform this maintenance work in a correct and timely fashion will void the guarantee. Failure to perform the prescribed maintenance work can lead to accidents! Do not do any maintenance or servicing work not described in this Instruction Manual. All such work may be done only by a DOLMAR service station.
After refuelling the brushcutter 50 times, it should be given a thorough maintenance check and a complete inspection at a DOLMAR service centre. Page General The brushcutter as a whole Clean exterior, check for damage. In case of damage, have repaired by a qualified service centre immediately
Before each start Cutting tool Check for any signs of damage, that the tool is sharp and that it is firmly secured. Guards Check for correct position, firm attachment and good condition. 10 Screws and nuts Check their condition and that they are firmly secured. I/O-switch, 16 Safety locking button, Throttle lever Functional check 16 Fuel tank cap and fuel system Check for tightness Idling speed Check, the cutting tool must not turn when the engine is idling. 16 Every time after the brushcutter is switched off Every 6 months Annually lf the brushcutter is not to be used for a long period of time Air filter Clean 18 Cooling slit Clean, check for any signs of damage. Spark plug Suction head Fuel tank Starter cable Check and replace if necessary Have checked by a qualified workshop Clean Check for any signs of damage.
The brushcutter as a whole Check at an authorized service centre The brushcutter as a whole Fuel tank Carburetor Metal cutting tools Have a maintenance check carried out at a DOLMAR service centre. Store safely in a dry room. Empty and clean Run empty Clean and lubricate lightly Use the tool protection
Sharpening of cutting tools
4-tooth star blade Note: The cutting tools below should be sharpened only at a qualified workshop! Manual resharpening will result in an imbalance of the cutting tool, causing vibrations and engine damage. 4-tooth star blade Expert sharpening can be obtained from a DOLMAR service station. Note: To prolong its useful lifetime, the 4-tooth star blade can be turned once until both cutting sides are blunt.

Cleaning the air filter

- Loosen the screws (A/1) and remove the air filter cover (A/2). - Take the foam filter out of the cover. Caution: To prevent eye injuries, do not blow out dirt particles! - Very dirty filters can be cleaned out using regular dishwashing liquid in lukewarm water. - If it is very dirty clean it more often. Only a clean filter ensures full engine power! - Before reinstalling the air filter check the choke valve for dirt particles, and if necessary clean it out with a brush. - Carefully dry the air filter and reinstall it. - First insert the air filter cover (A/2) in the groove (A/4) and then affix with the screw (A/1). Important: If the air filter is damaged replace it immediately! Tornoff fabric pieces and large dirt particles can destroy the engine!

Replacing the spark plug

NEVER touch the spark plug or spark plug cap while the engine is running (high voltage)! A hot engine can cause severe burns. Wear protective gloves! Never do maintenance work with the engine running! CAUTION!
- Pull the spark plug cap (B/6) off the plug. Remove the spark plug with a spark plug wrench (19 mm size). Note: Replace only with NGK BPMR8Y spark plugs! Electrode gap The electrode gap must be 0.6 0.7 mm.
The spark plug must be replaced if the insulator is damaged or if the electrodes are severely eroded or dirty or oily.
Inspecting the spark plug
- Insert the wrench (C/7) between the housing and the cylinder, only as shown in the illustration. CAUTION!
Do not insert the wrench into the spark plug hole. Make contact only with the cylinder (otherwise you may damage the engine). - Firmly connect the spark plug cap to the spark plug (removed from the engine) and hold it against the wrench using insulated pliers (away from the spark plug hole!). - Move the combination switch (I/O) to the I position. - Pull the starter cable hard. A spark should be visible at the electrode gap.

Lubricating the gear box

Suction head in the fuel tank
After about 50 operating hours the gear box (D/8) should be checked by a OLMAR service centre, and if necessary regrease. The service centre will add the exact amount of grease, as excessive grease will lead to overheating of the gearbox.

The felt filter (E/9) of the suction head is used to filter the fuel taken in by the carburetor.
A periodical visual inspection of the felt filter should be conducted. For this purpose open the tank cap, and use a wire hook to pull out the suction head through the tank opening. If the filter has hardened or is dirty or clogged, replace it. Insufficient fuel supply can result in the admissible maximum speed being exceeded. It is therefore important to replace the felt filter at least every three months to ensure a good fuel supply to the carburetor.
Servicing and maintenance

Service

After about 50 tankfuls, have the brushcutter thoroughly inspected at a DOLMAR service centre.
Cleaning the muffler opening
Regularly inspect the muffler opening (E/8). When it becomes clogged with carbon residues, carefully scrape them out with the suitable tool.
No maintenance and adjustment work not described in this manual may be performed by the user. Al such work must be performed only by a DOLMAR service centre.

Trouble shooting Fault

Engine will not start or starts only with difficulty

System Ignition system

Observation Ignition spark OK
Cause Fault in fuel supply or compression system, mechanical defect
No ignition spark Fuel supply Fuel tank full
STOP switch is depressed, wiring fault or short circuit, spark plug or connector defective, ignition module faulty Incorrect choke position, carburetor defective, suction head dirty, fuel supply line bent or interrupted
Compression Inside of engine system Outside of engine Mechanical fault

Starter not engaging

Cylinder bottom gasket defective, crankshaft seals damaged, cylinder or piston rings worn Poor sealing of spark plug
Broken starter spring, broken parts inside engine Incorrect carburetor setting

Warm start problems

Carburetor

Tank filled

Ignition spark OK
Engine starts but Fuel supply Tank full dies immediately Insufficient power
Incorrect idle speed, suction head or carburetor dirty Fuel tank vent defective, fuel supply line interrupted, cable or STOP switch faulty Air filter dirty, carburetor adjustment incorrect, muffler clogged, exhaust duct in the cylinder clogged

DOLMAR GmbH Postfach 20 D-22004 Hamburg Germany http://www.dolmar.com
Specifications subject to change without notice

Form: 482 (2.06 GB)