Oleo-Mac GSH 51 / GSH 510: H series chainsaws Owner’s Manual

Oleo-Mac GSH 51 / GSH 510: H series chainsaws

INTRODUCTION

For correct use of the machine and to avoid accidents, do not start working until you have read this manual carefully. You will find explanations concerning the operation of the various parts plus instructions for necessary checks and relative maintenance.

NOTE : The descriptions and illustrations contained in this manual are not binding. The manufacturer reserves the right to undertake any modifications it deems necessary without revising this manual.

In addition to the operating instructions, this manual contains paragraphs that require your special attention. Such paragraphs are marked with the symbols described below:

WARNING : where there is a risk of an accident or personal, even fatal, injury or serious damage to property.
CAUTION : where there is a risk of damaging the machine or its individual components.

WARNING: RISK OF HEARING DAMAGE
IN NORMAL CONDITIONS OF USE, THIS MACHINE MAY EXPOSE THE OPERATOR TO A PERSONAL DAILY NOISE LEVEL EQUAL TO OR HIGHER THAN 85 dB (A)

EXPLANATION OF SYMBOLS AND SAFETY WARNINGS (Fig.1)

1. Read operator’s instruction book before operating this machine.
2. Wear head, eye and ear protection.
3. Type of machine: CHAIN SAW.
4. Serial number
5. Year of manufacture
6. Primer bulb
7. Chain brake, activated (right). Chain brake, not activated (left).

CHAIN SAW COMPONENTS (Fig. 2)

1. Choke lever
2. Throttle trigger
3. Throttle trigger lockout
4. Carburetor adjustment screws
5. Inertial brake lever
6. Exhaust muffler
7. Chain
8. Guide bar
9. Air filter cover
10. On/off switch
11. Fuel tank cap
12. Starter handle
13. Oil tank cap
14. Primer bulb
15. Lateral chain tensioner screw
16. Front handle
17. Rear handle
18. Bar cover

SAFETY PRECAUTIONS

WARNING – If correctly used, the chainsaw is a quick, easy to handle and efficient tool; if used improperly or without the due precautions it could become a dangerous tool. For pleasant and safe work,always strictly comply with the safety rules that follow and throughout this manual.

WARNING : The ignition system of your machine produces an electromagnetic field of very low intensity. This field could interfere with certain pacemakers. To reduce the risk of serious or fatal injury, persons with pacemakers should consult their doctor or the manufacturer of the pacemaker before using this machine.

WARNING : – National regulations could limit use of the machine.

1. Do not use the chainsaw until you have completely understood the specific operating methods. First time users must familiarize themselves thoroughly with the operation of the machine before working in the field.
2. The chainsaw must only be used by adults in good physical condition with knowledge of the operating instructions.
3. Do not use the chainsaw when you are physically tired or if you have taken alcohol, drugs, or medication.
4. Never wear scarves, bracelets or anything else which could be taken up by the machine or chain. Wear close-fitting safety clothing.
5. Wear protective non-slip safety shoes, gloves, glasses, ear protection and safety helmet.
6. Never allow bystanders to remain within your working area when starting or cutting with the saw.
7. Do not start cutting until you have a clear work area. Do not cut near electric cables.
8. Always cut from a firm-footed and safe position.
9. Only use the chainsaw in well-ventilated places, do not operate the chainsaw in explosive or flammable atmospheres or in closed environments.
10. Never touch the chain or attempt to service the saw while the engine is running.
11. It is prohibited to fit any device other than that supplied by the manufacturer.
12. All labels with health hazards must be kept in good conditions. In case of damage or deterioration, immediately substitute them (Fig. 1).
13. Do not utilize the machine for uses different from the ones specified in the manual (see pag. 15).
14. Never leave the machine unattended with the engine running.
15. Check the chainsaw each day to ensure that each device, whether for safety or otherwise, is functional.
16. Always follow the manufacturer ’s instructions for the maintenance operations.
17. Never use a damaged, modified, or improperly repaired or assembled chainsaw. Do not remove, damage or deactivate any of the safety devices. Only use bars of the length indicated in the table.
18. Never carry out operations or repairs on your own that are other than routine maintenance. Call specialized and authorized workshops only.
19. Never start up the chainsaw without the chain cover fitted.
20. If your chainsaw is no longer usable, dispose of it properly without damaging the environment by handing it in to your local Dealer who will arrange for its correct disposal.
21. Only loan your saw to expert users who are completely familiar with saw operation and correct use. Give other users the manual with operating instructions, which they should read before using the saw.
22. All saw service, other than the operations shown in the present manual, should be performed by competent personnel.
23. Keep this manual on hand and consult it before each use of the tool.
24. Please note that the owner or the user is responsible for any accidents or damage to third parties or their property.

SAFETY PROTECTIVE CLOTHING

Major cases of chainsaw accidents happen when the chain hits the operator. While working with the chainsaw, always use safety protective approved clothing. The use of protective clothing does not eliminate injury risks, but it reduces the injury effects in case of accident. Consult your trusted supplier to choose an adequate equipment.

The clothing must be proper and not an obstacle. Wear adherent anti-cut clothing. Anti-cut jackets, dungarees and leggings are the ideal. Do not wear clothes, scarves, ties or bracelets that can stuck into woods or twigs. Tie up and protect long hair (example with foulards, cap, helmets, etc.) Safety shoes or boots having skid-proof sole and anti-piercing insert.

Wear protective helmet in places where there can be falling objects. Wear protective goggles or face screens! Use protections against noises; for example noise reduction ear guards or earplugs. The use of protections for the ear requests much more attention and caution, because the perception of danger audio signals (screamings, alarms, etc.) is limited. Wear anti-cut gloves.

FITTING THE BAR AND CHAIN

WARNING – Always wear work gloves during assembly procedures. Use only bars and chains recommended by the manufacturer (page 21).

• Pull the guard (Fig. 3) towards the front handle to check that the chain brake is not on.
• Remove the bar nuts (A) and the chain cover (B, Fig. 4).
• Remove and discard the plastic shim from the bar studs (C, Fig. 5).
• Take the chain tightener pawl (D, Fig. 5) to the limit stop, by unscrewing all the chain tightener screw (L).
• Place the bar (F, Fig. 5) onto the studs (N).
• Fit the chain (H, Fig. 6) inside the sprocket (E) and the bar groove (M). Pay attention to the direction of rotation of the chain (Fig. 8).
• Put down the chain cover, inserting it into its housing and, keeping it pressed against the bar, screw on the chain tightener screw (L, Fig. 7) so that the pawl (D, Fig. 5) goes into the hole (G) of the bar.
• Fit the chain cover and the relative nuts without tightening them.
• Tension the chain by means of the tensioning screw (L, Fig. 7).
• Hold the tip of the guide bar up and tighten the chain cover nut securely (Fig. 9). The tightening torque is 1,5 kgm (15 Nm). The chain should be taut but turn freely by hand (Fig. 10).
• The chain is tensioned correctly when it can be pulled upwards a few millimetres (Fig. 10).

WARNING – Always maintain the correct chain tension. An excessively slack chain increases the risk of kickback and the chain may ride out of the bar channel; these events can cause injury the operator and damage to the chain. An excessively slack chain will result in rapid wear of chain, bar and sprocket. On the contrary, an over tensioned chain will tend to overload the motor with resulting damage. A correctly tensioned chain provides the best cutting characteristics, optimal safety, and long working life of the chain. The working life of the chain depends on correct tensioning and correct lubrication.

STARTING

FUELING

WARNING : Gasoline is an extremely flammable fuel. Use extreme caution when handling gasoline or fuel mix. Do not smoke or bring any fire or flame near the fuel or the chainsaw.

• To reduce the risk of fire and burn injury, handle fuel with care. It is highly flammable.
• Mix and store fuel in a container approved for gasoline.
• Mix fuel outdoors where there are no sparks or flames.
• Select bare ground, stop engine, and allow to cool before refueling.
• Loosen fuel cap slowly to release pressure and to keep fuel from escaping around the cap.
• Tighten fuel cap securely after refueling. Unit vibration can cause an improperly tightened fuel cap to loosen or come off and spill quantities of fuel.
• Wipe spilled fuel from the unit. Move 3 meter away from refueling site before starting engine.
• Never attempt to burn off spilled fuel under any circumstances.
• Do not smoke while handling fuel or while operating the chainsaw.
• Store fuel in a cool, dry, well ventilated place.
• Never place the machine in a combustible area such as dry leaves, straw, paper, etc.
• Store the unit and fuel in an area where fuel vapors cannot reach sparks or open flames from water heaters, electric motors or switches, furnaces, etc.
• Never take the cap off the tank when the engine is running.
• Never use fuel for cleaning operations.
• Take care not to get fuel on your clothing.

This product is powered by a 2-cycle engine and requires pre-mixing gasoline and 2-cycle oil. Pre-mix unleaded gasoline and 2-cycle engine oil in a clean container approved for gasoline.

RECOMMENDED FUEL: THIS ENGINE IS CERTIFIED TO OPERATE ON UNLEADED GASOLINE INTENDED FOR AUTOMOTIVE USE WITH AN OCTANE RATING OF 89 ([R + M] / 2) OR HIGHER.

Mix 2-cycle engine oil with gasoline according to the instructions on the package. We strongly recommend the use of 2% (1:50) Oleo-Mac/Efco two cycle engine oil, which is specifically formulated for all air-cooled two-stroke engines. The correct oil / fuel proportions shown in the table are suitable when using the Oleo-Mac/Efco PROSINT 2 and EUROSINT 2 or an equivalent high- quality engine oil (JASO specification FD or ISO specification L-EGD).

CAUTION : DO NOT USE AUTOMOTIVE OIL OR 2-CYCLE OUTBOARD OIL.

CAUTION :

• Match your fuel purchases to your consumption; don’t buy more than you will use in one or two months;
• Store gasoline in a tightly-closed container in a cool, dry place.

CAUTION – For the mixture, never use a fuel with an ethanol percentage higher than 10%; gasohol (mixture of gasoline and ethanol) up to 10% ethanol or E10 fuel are acceptable.

NOTE – Prepare only the quantity of mixture required for immediate use; do not leave fuel in the tank or a container for a long time. Were commend the use of the additive Emak ADDITIX 2000 code 001000972 if the mixture is to be stored for 12 months. Alkylate gasoline

CAUTIONS – Alkylate fuels have different density than normal fuel. Therefore engines, set with normal fuel, need different H jet regulation to avoid critical issues. For this operation it’s necessary turned at a Licensed Service Dealer.

FILLING THE TANK
Stir the mixture well before refuelling.

WARNING : Follow safety instruction for fuel handling. Always shut off engine before fuelling. Never add fuel to a machine with a running or hot engine. Move at least 3 m from refuelling site before starting engine. DO NOT SMOKE!

1. Clean surface around fuel cap to prevent contamination.
2. Loosen fuel cap slowly.
3. Carefully pour fuel mixture into the tank. Avoid spillage.
4. Prior to replacing the fuel cap, clean and inspect the gasket.
5. Immediately replace fuel cap and hand tighten. Wipe up any fuel spillage.
   WARNING : Check for fuel leaks, if any are found, correct before use. Contact a Servicing Dealer if necessary.

OIL FILLING AND CHAIN LUBRICATION

The saw chain is automatically lubricated during use by a pump which normally requires no maintenance. The oil flow is pre-regulated by the manufacturer to ensure a sufficient oil delivery even under heavy working conditions. During cutting of thin timber a possible oil dripping is normal.

• Always wipe off around the filler hole before unscrewing the cap (13, Fig. 2) so that no dirt enters the oil reservoir.
• During work watch the oil level.
• After the filling, operate the motor 2 or 3 times to restore correct oil delivery.
• In case of faults do not try to repair the machine yourself, but apply to your authorized dealer. Correct chain lubrication during the cutting phase reduces wear to a minimum between the chain and bar thus prolonging life. Always use a good quality oil.

WARNING – Never use waste oil. Always use biodegradable lubricant (ecolube Oleo-Mac/Efco) which is specific for bar and chain and also respectful towards nature, operator health and chain saw’s parts. Before starting make sure the chain is not obstructed. When the engine is idling the chain must not turn. Otherwise contact an Authorized Service Center to carry out a check and fix the problem. When the chainsaw is running, grip the front handle firmly with your left hand and the back handle with your right hand (Fig. 11).

• Do not lean forward and do not cut above shoulder height; gripping the chain saw at the top of the handle makes it difficult to control and counteract kickback.
• Check that all parts of the body are kept away from the chain and muffler.
• Lef t -hander s should fol low these instructions too. Keep a proper cutting stance.

Over exposure to vibrations can result in blood-vessel or nerve injury to persons suffering with blood circulation problems. Seek medical attention if you experience physical symptoms such numbness, lack of feeling, reduction in normal strength, changes in the color of the skin. These symptoms normally appear in the fingers, hands or wrists.

Engine is Flooded

• Set the on/off switch to STOP (0) (B, Fig. 13).
• Unscrew the screw on the cover (A, Fig. 25).
• Remove the cover.
• Pry off the spark plug boot.
• Unscrew and dry off the spark plug.
• Open the throttle wide.
• Pull the starter rope several times to clear the combustion chamber.
• Refit the spark plug and connect the spark plug boot, press it down firmly.
• Set the on/off switch to I, the starting position.
• Set the choke lever to OPEN position – even if engine is cold.
• Now start the engine.

WARNING – Never start the saw engine without the bar, chain and clutch cover (chain brake) assembled – or else the clutch can come loose and cause personal injuries.

STARTING THE ENGINE

The chain brake must be engaged when starting the saw. Set the chain brake by pushing the chain brake lever / hand guard forward (towards the bar), to the brake position (Fig. 12). Fill the carburetor by pushing primer bulb (A, Fig. 14). Put the ON/OFF switch (B, Fig. 13) in the “I” position. Pull the choke lever (D, Fig. 14) CLOSE. Place the chainsaw on the ground in a stable position. Check that the chain is free to turn and will not come into contact with any foreign objects. Before you start the engine, make sure the saw chain is not contacting any object. Never try to start the saw when the guide bar is in a cut. Hold the front handle firmly with the left hand and put your right foot onto the base of the rear handle (Fig. 15). Pull the starter cord a few times until the first kick over of the engine is heard. Push the choke lever in (D, Fig. 14) to its’ original position “OPEN”. Pull the starter cord to start the engine. Once the engine is going release the chain brake and wait for a few seconds. Then accelerate with the throttle (C, Fig. 13) to fire the half throttle-blocking device. Release the brake (Fig. 3).

WARNING – Once the engine is warmed up do not use the choke to start up again.
WARNING – Use the semi-acceleration device only in the phase of starting the engine.

BREAKING-IN THE ENGINE
The engine reaches the maximum power after 5÷8 hours of activity. During this period of breaking-in do not use the engine at wide open throttle without load, to avoid excessive functioning stress.

WARNING! – During the breaking-in period do not vary the carburetion to obtain a presumed power increment; the engine can be damaged.

NOTE : It is normal for smoke to be emitted from a new engine during and after first use.

BREAKING-IN THE CHAIN

New chains will stretch and must be tightened frequently. Tension adjustment should only be made when the chain is cool. First, turn the chain and lubricate it with additional oil. Then start the saw and allow it to run at moderate speed, checking that the oil pump is working properly. Stop the engine and adjust the chain tension. Start the saw again and make a few cuts in a trunk to heat up the chain. Stop the engine, allow the chain to cool and adjust again. Repeat this process until the chain retains proper tension. Do not touch the ground with the chain.

WARNING – Never touch the chain while the motor is running. Do not touch the ground with the chain.

STOPPING THE ENGINE
Release the throttle lever (C, Fig. 13) and let the engine return to idle. Turn off the engine, putting the ON/OFF switch (B) in the STOP (0) position. Do not put the chain saw on the ground when the chain is still moving.

USE

CHAIN BRAKE

The inertial chain brake ensures maximum safety in using the chainsaw. It protects the operator from dangerous kickback which can occur during working phases. It is actuated, with consequent instant locking of the chain, when the operator presses the lever (manual operation) or automatically by inertia when the protection ispushed forward (Fig. 16) in the event of sudden kickback (inertial operation). The chain brake is released by pulling the lever towards the operator (Fig. 3).

CHECKING BRAKE OPERATION

At machine inspection prior to each job, check the operating condition of the brake following the steps below:

1. Start the engine and grasp the handle securely with both hands.
2. Pulling the throttle lever to maintain the chain operation, push the brake lever down toward the front using the back of your left hand (Fig. 11).
3. When the brake operates and the chain is stopped, release the throttle lever.
4. Release the brake (Fig. 3).

BRAKE MAINTENANCE: always keep the chain brake mechanism clean and lubricate the leverage. Check wear on the brake belt. Its minimum thickness must be 0.30 mm.

PROHIBITED USE

WARNING – Always follow the safety regulations. This chain saw is designed and built for pruning and tending standing trees or shrubs. It is forbidden to cut other types of material. Vibrations and kickback vary with different materials and the requirements of the safety regulations would not be respected. Do not use the chainsaw as a lever for lifting, moving or splitting objects. Do not lock it over fixed stands. It is forbidden to hitch tools or applications to the P.t.o. that are not specified by the manufacturer.

PRECAUTIONS FOR THE WORK AREA

• Do not work near electrical cables.
• Work only in conditions offering sufficient visibility and light to see clearly.
• Stop the engine before setting the chainsaw down.
• Be particularly cautious and alert when wearing ear protectors, as these can restrict your ability to hear sounds indicating danger (shouts, signals, warnings, etc.)
• Be extremely careful when working on slopes or uneven surfaces.
• Do not cut above chest height, as a saw held higher is difficult to control against kickback forces.
• Do not cut from a ladder, this is extremely dangerous.
• Stop the saw if the chain strikes a foreign object. Inspect the saw and repair parts as necessary.
• Keep the chain out of dirt and sand. Even a small amount of dirt will quickly dull a chain and increase the possibility of kickback.
• Always keep the handles dry and clean.
• When cutting a limb that is under tension, be alert for springback so you will not be struck when the tension in the wood fibre is released.
• Take great care when cutting small branches or shrubs which can block the chain, be thrown back towards you or cause you to lose your balance.

OPERATING INSTRUCTIONS

WARNING – Tree filling is a task that requires experience. Not groped tree filling if you are inexperienced. AVOID ALL TRANSACTIONS FOR WHICH YOU ARE NOT QUALIFIED! It is recommended that inexperienced operators to refrain tree filling if the trunk has a diameter greater than the length of the bar. When using the chainsaw for the first time, make several cuts in a small trunk in order to become familiar with the saw in action. Always use full throttle when cutting with the saw, regardless of the size of the timber. Never push down on the saw when cutting. The weight of the saw alone enables it to cut properly with minimum effort.

WARNING – Never cut in high wind, bad weather, when visibility is poor or in very high or low temperatures. Always check the tree for dead branches which could fall during the felling operation.

TREE FELLING

In tree filling and bucking operations exploit the presence of spike bumpers, pivoting on it. Study the tree and surrounding area before starting to cut. Clear the work area before beginning to cut. Prepare the widest possible path of retreat for when the tree falls (Fig. 17). Cut off any branches at the bottom of the trunk up to a height of about 2 metres. Make a 90 degree notch on the face of the tree, in the direction it will fall. The depth of the notch should never exceed 1/4 of the diameter of the trunk (1 – Fig. 18). About 10 cm (4”) higher up the trunk make a cut down towards the first cut, in order to extract a wedge. This is the mouth of the hinge, and is the direction in which the tree falls (2 – Fig. 18). Now, make your felling cut on the opposite side of the trunk. Start the cut about 4-5 cm (2”) higher than the center of the notch (3 – Fig. 18). Always leave a hinge (A, Fig. 19-24) which allows you to control the direction the tree falls in. Put a wedge into the felling cut, before the tree starts to move, to prevent the chainsaw guide bar from getting stuck. If the diameter of the trunk is greater than the length of the guide bar, make the felling cut as shown in the sequence of Fig. 19.

LIMBING

1. Always start from the larger diameter and move towards the tip to cut off limbs and any secondary branches.
2. Always find the safest and most stable position before accelerating the chainsaw. If necessary, keep your balance by resting your knee on the trunk itself.
3. Keep the chainsaw on the trunk so as not to get too tired, turning it onto the left- or right-hand side depending on the position of the branch to cut (Fig. 20).
4. In the case of branches under tension, find a safe position to protect yourself if they whip back. Always start the cut from the opposite side to the bend.
5. When lopping large diameter branches make use of the bumper spike.
   WARNING – Do not use the upper edge of the tip of the guide bar to cross- cut; otherwise you might risk a kickback.

BUCKING

When bucking up the trunk to desired lengths, there is one basic rule to follow. Look to see where the trunk is supported, and determine which way the two halves will fall when cut.

1. If the trunk is supported at both ends, first make a small cut at the top (1 – Fig. 21), then complete the cut from the bottom (2 – Fig. 21). This will avoid pinching the saw.
2. If the trunk is supported at one end or near the center, first make a small cut from underneath (1 – Fig. 22), then complete the cut from the top (2 – Fig. 22).
   WARNING – If the saw becomes pinched in the trunk, stop the engine, lift the log and change its position (Fig. 23). Never attempt to free the saw by pulling on it.

MAINTENANCE

WARNING – Always wear protective gloves during maintenance operations. Do not carry out maintenance when the engine is hot.

CHAIN SHARPENING
The pitch of the chain (Fig. 25) is .325” or 3/8”. Sharpen the chain using protective gloves and a round file of Ø 4.8 mm (3/16”) or Ø 5.5 mm (7/32”).

WARNING – Do not fit the chain .325” on the 3/8” pinion or vice versa. Always sharpen the cutters only with outward strokes observing the values given in Fig. 25. After sharpening, the cutting links must all have the same width and length.

WARNING – A sharp chain produces welldefined chips. When your chain starts to produce sawdust, it is time to sharpen. After every 3-4 times the cutters have been sharpened you need to check the height of the depth gauges and, if necessary, lower them using the flat file and template supplied optional, then round off the front corner (Fig. 26).

WARNING – Proper adjustment of the depth gauge is as important as proper sharpening of the chain.

GUIDE BAR
The guide bars provided with a sprocket at their tip must be lubricated with grease using a lubrication syringe. The bar should be reversed every 8 working hours to ensure uniform wear. Keep the bar groove and lubrication hole clean using the bar groove cleaner supplied optional. Check the bar rails frequently for wear and, if necessary, remove the burs and square-up the rails using the flat file.

WARNING – Never mount a new chainsaw on a worn sprocket.

AIR FILTER – Rotate the knob (A, Fig. 27) and check the air filter (B) each day. Open air cleaner (B) by means of the two tabs (C). Clean with Emak degreaser p/n 001101009A, rinse with water and blast dry with compressed air, not too close, blowing from the inside outwards. Renew the filter if heavily clogged or damaged.

WARNING! – When refitting the air filter (B), fit it into well, before reassembly.

FUEL FILTER – Check the fuel filter periodically. Replace it if too dirty (Fig. 28).

OIL PUMP (automatic/adjustable) – Flow adjustment is pre-set by the manufacturer. Oil flow can be adjusted by the operator according to specific requirements by means of the special adjusting screw (Fig. 32). Oil flow occurs only when the chain is moving.

WARNING – Never use scavenge oil.

STARTING UNIT – Use a brush or compressed air to keep the cooling louvers of the starter assembly free and clean.
ENGINE – Clean the cylinder fins with compressed air or a brush periodically. Dangerous overheating of engine may occur due to impurities on the cylinder.
SPARK PLUG – Clean the spark plug and check the electrode gap periodically (Fig. 29). Use TORCH L8RTF or of other brand with the same thermal grade.
CHAIN BRAKE – If the chain brake does not work properly, remove the chain cover and the clean brake components. Replace the chain brake band if worn or deformed.
GUIDE BAR – Turn the guide bar and check that the lubrication holes are free from impurities. Never use fuel for cleaning operations.
CARBURETOR
Before adjusting the carburetor, clean the starter cover, the air filter (Fig. 27) and warm up the engine. The carburetor (Fig.30) is adjusted in the factory by means of screw L (open about 1 turn +1/2) and screw H (open about 1 turn +1/2). Idle screw T is adjusted in order to ensure a good safety margin between idle running and clutch engagement. Screw L must be adjusted so that the engine promptly responds to sharp accelerations and gives good idle operation. Screw H must be adjusted so that the engine gives maximum power during the cutting phase.

WARNING – Weather conditions and altitude may affect carburation. Do not allow anyone to stay close to the chainsaw while working or while adjusting the carburetor.

EXTRA MAINTANANCE ADVISABLE

It is advisable to inspect the machine by a specialized technician at an authorized service network at the end of season, if used intensively, and every two years if with normal use.

WARNING! – Any maintenance operations not specifically dealt with in this manual must be carried out by an authorized service center. To ensure that your chainsaw continues to function correctly, use only ORIGINAL

REPLACEMENT PARTS.
Any unauthorized changes and/or use of non-original replacement parts may result in serious injury or death to the operator or third parties.

TRANSPORTION
Carry the chainsaw with the engine stopped, guide bar to the rear and chain cover on (Fig. 31).

WARNING – When transporting the machine on a vehicle, ensure that it is firmly and securely fastened using straps or belts. The machine must be transported in the horizontal position, also ensuring compliance with applicable transport regulations for such machines.

MAINTENANCE CHART

Please note that the following maintenance intervals apply for normal operating conditions only. If your daily work requires longer than normal or harsh cutting conditions are present the suggested intervals should be shortened accordingly.

| ****

Before Each Use

| After Each| ****

Weekly

| If Damaged or
Complete Machine| Inspect (Leaks, Cracks, and Wear)| X| X|  |
Controls (Ignition Switch, Choke Lever, Throttle Trigger, Trigger Interlock)| Check Operation| X| X|  |
Chain Brake| Check Operation| X| X|  |
Check by Dealer|  |  |  | X
Fuel Tank and Oil Tank| Inspect (Leaks, Cracks, and Wear)| X| X|  |
Fuel Filter| Inspect and Clean|  |  | X|
Replace Filter Element|  |  |  | X
Chain Lubrication| Check Output| X| X|  |
Saw Chain| Inspect (Damage, Sharpness, and Wear)| X| X|  |
Check Tension| X| X|  |
Sharpen (Check Gauge Depth)|  |  |  | X
Guide Bar| Inspect (Damage, and Wear)| X| X|  |
Clean Bar groove and Oil Passages| X|  |  |
Rotate, Lubricate Sprocket Nose and Deburr|  |  | X|
Replace|  |  |  | X
Rim Sprocket| Inspect (Damage, and Wear)|  |  | X|
Replace|  |  |  | X
Clutch Drum| Inspect (Damage, and Wear)|  |  | X|
Replace|  |  |  | X
Chain Catcher| Inspect (Damage, and Wear)| X| X|  |
Replace|  |  |  | X
All Accessible Screws and Nuts (not Adjusting Screws)| Inspect – Retighten|  | | X|
Air Filter| Clean| X|  |  |
Replace|  |  |  | X
Cylinder Fins and Starter System Vents| Clean|  |  | X|
Starter Rope| Inspect (Damage, and Wear)|  |  | X|
Replace|  |  |  | X
Carburetor| Check Idle (Chain must not rotate at Idle)| X| X|  |
Spark Plug| Check Electrode Gap|  |  | X|
Replace|  |  |  | X
Vibration Mounts| Inspect (Damage and Wear)|  |  | X|

STORAGE
If the machine is to be stored for long periods:

• Drain and clean the fuel and oil tank in a wellventilated area.
• Dispose of fuel and oil according to the rules and respect the environment.
• To drain the tank, start the engine and wait until the fuel is exhausted and the engine stops (leaving the fuel mixture in the carburetor could damage the membranes).
• Remove, clean, and spray it with protective oil on the chain and the bar.
• Thoroughly clean the air intake slots on the starter housing, the air filter (Fig. 27), and the cylinder fins.
• Store the blower in a dry place, preferably not in direct contact with the ground, away from heat sources, and the tanks empty.
• The procedures for returning the machine to service following winter storage are the same as for starting up during everyday use  (page 12).

ENVIRONMENTAL PROTECTION

Environmental protection should be a priority of considerable importance when using the machine, for the benefit of both social cohesion and the environment in which we live.

• Try not to cause any disturbance to the surrounding area.
• Scrupulously comply with local regulations and provisions for the disposal of oils, petrol, batteries, filters, deteriorated parts or any elements which have a strong impact on the environment. This waste must not be disposed of as normal waste, it must be separated and taken to specified waste disposal centers where the material will be recycled.

Demolition and disposal
When the machine reaches the end of its service life, do not dispose of it into the environment; instead take it to a waste disposal center. Most materials used in the manufacture of the machine are recyclable; all metals (steel, aluminium, brass) can be delivered to a normal recycling station. For information contact your local waste recycling service. Waste disposal must be carried out with respect for the environment, avoiding soil, air and water pollution. In all cases, applicable local legislation must be complied with.

TECHNICAL DATA

Recommended guide bar and chain combinations| GSH 510 – MTH 5100 – GSH 560 – MTH 5600
---|---
Chain pitch and gauge| 0.325″ x .050″| 0.325″ x .058″| 3/8″ x .058″
Guide bar length| 18″ (45 cm)| 20″ (50 cm)
Type of guide bar| 50310206

50310214

| 50310207

50310215

| 50310121

50310233

| 50310177

50310234

Type of chain| 95VPX072X| 21BPX078X| 73DPX068X| 73DPX072X
Cutting length| 430 mm| 475 mm
 |  |  | GSH 51

MTH 510

| GSH 56

MTH 560

|
---|---|---|---|---|---

Pressure level

| ****

dB (A)

| L pA av

EN 11681-1

EN 22868

| ****

99.2

| ****

103.3

| ****

Uncertainty| dB (A)|  | 2.7| 3.1|

Measured sound power level

| dB (A)| 2000/14/EC EN 22868

EN ISO 3744

| 110.2| 113.4|
Uncertainty| dB (A)|  | 2.7| 3.0|

Guaranteed sound power level

| ****

dB (A)

| L WA 2000/14/EC EN 22868

EN ISO 3744

| ****

113.0

| ****

116.0

|

Vibration level (3/8″)

| m/s 2| EN 11681-1

EN 22867

EN 12096

| 5.2 (sx)

4.8 (dx)

| 7.3 (sx)

7.0 (dx)

| ***
Uncertainty| m/s 2| EN 12096| 1.6 (sx)**

1.7 (dx)

| 1.8 (sx)

2.1 (dx)

|

Vibration level (.325″)

| m/s 2| EN 11681-1

EN 22867

EN 12096

| 5.8 (sx)

5.3 (dx)

| 7.2 (sx)

7.0 (dx)

| ***
Uncertainty| m/s 2| EN 12096| 1.6 (sx)**

1.9 (dx)

| 1.6 (sx)

1.6 (dx)

|
* Weighted average values (1/3 minimum rpm, 1/3 at full load, 1/3 racing).

WARRANTY CERTIFICATE

This machine has been designed and manufactured using the most modern techniques. The manufacturer guarantees its products for 24 months from the date of purchase, for private and hobby use. The warranty is limited to 12 months in case of professional use.

Limited warranty

1. The warranty period starts on the date of purchase. The manufacturer, acting through the sales and technical assistance network, shall replace free of charge any parts proven defective in material, machining or manufacturing. The warranty does not affect the purchaser’s rights as established under legislation governing the consequences of defects in the machine.
2. Technical personnel will undertake the necessary repairs in the minimum time possible, compatible with organizational needs.
3. To make any claim under the warranty, this certificate of warranty, fully completed, bearing the dealer’s stamp and accompanied by the invoice or receipt showing the date of purchase, must be displayed to the personnel authorized to approve work.
4. The warranty shall be null and void if:
   • the machine has evidently not been serviced correctly.
   • the machine has been used for improper purposes or has been modified in any way,
   • unsuitable lubricants and fuels have been used
   • non-original spare parts and accessories have been fitted
   • work has been done on the machine by unauthorized personnel
5. The warranty does not cover consumables or parts subject to normal wear.
6. The warranty does not cover work to update or improve the machine.
7. The warranty does not cover any preparation or servicing work required during the warranty period.
8. Damage incurred during transport must be immediately brought to the attention of the carrier: failure to do so shall render the warranty null and void.
9. Engines of other manufacturers (Briggs & Stratton, Subaru, Honda, Kipor, Lombardini, Kohler, etc.) fitted to our machines are covered by the warranties of the engine manufacturer.
10. The warranty does not cover injury or damage caused directly or indirectly to persons or things by defects in the machine or by periods of extended disuse of the machine resulting from the said defects.

TROUBLESHOOTING

WARNING : Always stop unit and disconnect spark plug before performing all of the recommended remedies below except remedies that require operation of the unit. When you have checked all the possible causes listed and you are still experiencing the problem, see your Servicing Dealer. If you are experiencing a problem that is not listed in this chart, see your Servicing Dealer for service.

PROBLEM| POSSIBLE CAUSE| SOLUTION
Engine will not start or will run only a few seconds after starting.| 1. No spark

2. Flooded engine.

| 1.  Watch for spark at spark plug tip. If there is no spark, repeat test with a new spark plug (L8RTF).

2.  Follow procedure page 14 If engine still fails to start, repeat procedure with a new spark plug.

Engine star ts but will not accelerate properly or will not run properly at high speed.| Carburetor requires adjustment.| Contact a Servicing Dealer for carburetor adjustment.
Engine does not reach full speed and / or emits excessive smoke| 1.   Check oil fuel mixture.

2.   Air filter dirty.

3.   Carburetor requires adjustment.

| 1.   Use fresh fuel and the correct 2-cycle oil mix.

2.   Clean per instruction in Maintenance- Air Filter Section.

3.   Contact a Ser vicing Dealer for carburetor adjustment.

Eng ine star ts , runs and accelerates but will not idle.| Carburetor requires adjustment.| Turn idle speed screw “ T” (Fig. 30) clockwise to increase idle speed.See Operation-Carburetor Adjustment.
Bar and Chain Running Hot and Smoking| 1.    Chain oil tank empty.

2.    Chain tension too tight.

3.    Oiler function.

| 1.   Oil tank should be filled every time that fuel tank is filled.

2.   Tension chain per instructions in Operation-Chain Tension section (Pag. 11).

3.   Run at full throttle 15 to 30 seconds. Stop saw and check for oil dripping from bar tip guard and guide bar. If oil is present the chain may be dull or bar may be damaged. If no oil contact a Servicing Dealer.

Engine starts and runs, but chain is not rotating

WARNING: N e v er touch the chain while the engine is running.

| 1.    Chain brake engaged.

2.    Chain tension too tight.

3.    Guide bar and chain assembly.

4.   Chain and/or guide bar damaged.

5.   Clutch drum and/or rim sprocket damaged.

| 1.    Release chain brake, see Operation- Chain Brake Section (Pag. 14).

2.    Tension chain per instructions in Operation-Chain Tension section (Pag. 11).

3.    Refer to Assembly-Assembling the Bar and Chain Section (Pag. 11).

4.    Refer to Maintenance-Chain and/or Maintenance- Guide Bar Section (Pag. 16).

5.    Replace if necessary – contact a Servicing Dealer.

References

• Emak Group
• EmakGroup - YouTube

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