FREE ENGLISH STIHL MS 660 (01) PDF USER GUIDE
FREE ENGLISH STIHL MS 660 (01) PDF USER MANUAL
FREE ENGLISH STIHL MS 660 (01) PDF OWNER GUIDE
FREE ENGLISH STIHL MS 660 (01) PDF OWNER MANUAL
FREE ENGLISH STIHL MS 660 (01) PDF REFERENCE GUIDE
FREE ENGLISH STIHL MS 660 (01) PDF INSTRUCTION GUIDE
FREE ENGLISH STIHL MS 660 (01) PDF REFERENCE MANUAL
FREE ENGLISH STIHL MS 660 (01) PDF INSTRUCTION MANUAL
FREE ENGLISH STIHL MS 660 (01) PDF OPERATING INSTRUCTIONS
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STIHL MS 660 (01) PDF SUMMARY:
How do I fuel my chain saw?
Fuel your chain saw in well-ventilated areas, outdoors. Always shut off the engine and allow it to cool before refueling. Remove the fuel filler cap on your chain saw carefully so as to allow any pressure build-up in the tank to release slowly. Never remove the fuel filler cap while the engine is running. Select bare ground for fueling and move at least 10 feet (3 m) from the fueling spot before starting the engine. Wipe off any spilled fuel before starting your chain saw.
What should I check while refueling?
Check for fuel leakage while refueling and during operation. If fuel leakage is found, do not start or run the engine until the leak is fixed and any spilled fuel has been wiped away. Take care not to get fuel on your clothing. If this happens, change your clothing immediately.
How do I correctly position and tighten the fuel cap in the fuel tank opening?
To do this with this STIHL cap, raise the grip on the top of the cap until it is upright at a 90° angle. Insert the cap in the fuel tank with the positioning mark on the grip of the cap and the “open” mark on the fuel tank opening lining up. Using the grip, press the cap down firmly while turning it clockwise as far as it will go (approx. 1/4 turn). The positioning mark on the cap should now line up with the “closed” mark on the tank. Fold the grip flush with the top of the cap. Grip the cap and check for tightness. If the grip does not lie completely flush with the cap and the detent on the grip does not fit in the corresponding recess in the filler opening, or if the cap is loose in the filler opening, the cap is not properly seated and tightened and you must repeat the above steps.
What do I do if my fuel cap is misaligned, damaged, or broken?
If the cap does not drop fully into the opening when the positioning marks line up and/or if the cap does not tighten properly when twisted, the base of the cap may be prematurely rotated (in relation to the top) to the closed position. Such misalignment can result from handling, cleaning or an improper attempt at tightening.
How do I return the cap to the open position for installation?
To return the cap to the open position for installation, turn the cap (with the grip up) until it drops fully into the tank opening. Next, twist the cap counterclockwise as far as it will go (approx. 1/4 turn) – this will twist the base of the cap into the correct position for installation. Then, twist the cap clockwise, closing it normally.
What if my fuel cap still does not tighten properly?
If your cap still does not tighten properly, it may be damaged or broken; immediately stop use of the unit and take it to your authorized STIHL dealer for repair.
What should I do before operation?
Take off the chain guard (scabbard) and inspect the chain saw for proper condition and operation.
What condition should I always check my chain saw for before starting?
Always check your chain saw for proper condition and operation before starting, particularly the throttle trigger, throttle trigger lockout, stop switch and cutting attachment. The throttle trigger must move freely and always spring back to the idle position. The Master Control Lever / stop switch must move easily to STOP, 0 or 0. Never attempt to modify the controls or safety devices.
What part of the fuel system should I check before starting?
Check fuel system for leaks, especially the visible parts, e.g., filler cap, hose connections, manual fuel pump (only for chain saws equipped with a manual fuel pump). Do not start the engine if there are leaks or damage – risk of fire! Have the chain saw repaired by a STIHL servicing dealer before using it.
What should I do after adjusting a saw chain?
After adjusting a saw chain, start the chain saw, let the engine run for a while, then switch engine off and recheck saw chain tension. Proper saw chain tension is very important at all times.
How do I start my chain saw using the first recommended method?
Make sure the chain brake is engaged and place the chain saw on firm ground or other solid surface in an open area. Maintain good balance and secure footing. Grip the front handlebar of the saw firmly with your left hand and press down. For saws with a rear handle level with the ground, put the toe of your right foot into the rear handle and press down. With your right hand pull out the starter grip slowly until you feel a definite resistance and then give it a brisk, strong pull.
How do I start my chain saw using the second recommended method?
Make sure the chain brake is engaged, grip the front handle of the chain saw firmly with your left hand. Keep your arm on the front handle in a locked (straight) position. Hold the rear handle of the saw tightly between your legs just above the knees. Maintain good balance and secure footing. Pull the starting grip slowly with your right hand until you feel a definite resistance and then give it a brisk, strong pull.
What should I do once the engine has started?
Once the engine has started, immediately blip the throttle trigger, which should release the Master Control lever to the run position and allow the engine to slow down to idle.
What do I do when pulling the starter grip?
When you pull the starter grip, do not wrap the starter rope around your hand. Do not let the grip snap back, but guide the starter rope to rewind it properly. Failure to follow this procedure may result in injury to your hand or fingers and may damage the starter mechanism.
What do I do to reduce the risk of personal injury from loss of control and / or contact with the running cutting tool?
To reduce the risk of personal injury from loss of control and / or contact with the running cutting tool, do not use your chain saw with incorrect idle adjustment. At correct idle speed, the cutting tool should not move. For directions on how to adjust idle speed, see the appropriate section of your instruction manual. If you cannot set the correct idle speed, have your STIHL dealer check your chain saw and make proper adjustments and repairs.
How do I hold and control the chain saw?
Always hold the chain saw firmly with both hands when the engine is running. Place your left hand on the front handle bar and your right hand on the rear handle and throttle trigger. Left-handers should follow these instructions too. Wrap your fingers tightly around the handles, keeping the handles cradled between your thumb and forefinger. With your hands in this position, you can best oppose and absorb the push, pull and kickback forces of your saw without losing control.
How do I fuel the chain?
Open the fuel tank and add the proper fuel.
How do I adjust chain tension during cutting work?
- Shut off the engine.
- Loosen the nuts.
- Hold the bar nose up.
- Use a screwdriver to turn the tensioning screw (1) clockwise until the chain fits snugly against the underside of the bar.
- While still holding the bar nose up, tighten down the nuts firmly.
- Go to “Checking Chain Tension”.
How do I check chain tension?
- Shut off the engine.
- Wear work gloves to protect your hands.
- The chain must fit snugly against the underside of the bar and it must still be possible to pull the chain along the bar by hand.
- If necessary, retension the chain.
- A new chain has to be retensioned more often than one that has been in use for some time.
- Check chain tension frequently – see chapter on “Operating Instructions”.
How do I fill the chain oil tank?
Open the chain oil tank and fill with chain oil.
How do I check chain lubrication?
Always check chain lubrication before starting work. To check chain lubrication, hold the running chain saw over a light surface (piece of cardboard, tree stump). If the chain lubrication system is working properly, oil will be thrown off the chain. If the chain lubrication system is not working properly, have it checked by your STIHL servicing dealer and do not continue to use the chain saw until the problem is resolved.
How do I operate the chain brake?
To check the chain brake, run the chain saw at full throttle, then push the chain brake lever fully forward. The chain should stop immediately. If the chain does not stop immediately, or if there are any other problems with the chain brake, take the chain saw to your STIHL servicing dealer for repair.
How do I operate my chain saw in the winter?
Move the slide control to the (snowflake) position. In this position, warm air flows around the carburetor to prevent icing.
How do I prepare my chain saw for winter operation?
Before using your chain saw in cold weather, you will need to prepare it for winter operation. Close the air filter cover and slide it all the way in. When using your chain saw in cold weather conditions, it is important to ensure that the carburetor does not ice up. This can be done by moving the slide control to the (snowflake) position, which allows warm air to flow around the carburetor.
How do I switch back to summer operation?
To switch back to summer operation, move the slide control back to the normal running position.
How do I turn on or off the handle heating?
Move the slide switch in the direction of the symbol to turn the handle heating on or off.
How do I start and stop the engine?
Move the Master Control lever down to the cold start position, pull the choke knob out fully. Set the stop switch to the “I” (run) position, press the decompression valve, then pull the starting grip until the engine attempts to start, push the choke knob fully in, and pull the starting grip until the engine runs.
How do I stop the engine?
Move the Master Control lever up to the stop position, or move the stop switch to the “0” (stop) position.
How do I operate my chain saw?
- Make sure the chain brake is disengaged.
- Hold the chain saw firmly with both hands.
- Start the engine.
- Let the engine warm up for a few minutes.
- Check the chain lubrication system.
- Start cutting.
How do I control the oil quantity?
Turn the adjusting screw clockwise or counterclockwise to set the oil quantity. “E” means more oil, and “–” means less oil.
How do I maintain the guide bar?
Turn the guide bar over regularly, clean the guide bar groove, and lubricate the guide bar sprocket.
How do I turn the guide bar over?
To ensure even wear, the guide bar should be turned over regularly (every week in case of full-time use).
How do I clean the guide bar groove?
Remove the saw chain and clean the guide bar groove with a screwdriver or a similar tool.
How do I lubricate the guide bar sprocket?
Lubricate the guide bar sprocket through the lubrication hole with a grease gun.
How do I clean the air filter system?
Clean the air filter system regularly to maintain engine performance.
How do I clean the air filter system?
Open the air filter cover, remove the air filter, and clean the air filter. If the air filter is very dirty, it should be replaced.
How do I remove the air filter?
Remove the air filter cover, take out the air filter, and carefully clean the dirt out of the filter housing.
How do I clean the air filter?
Tap it out or blow it out from the inside to the outside with compressed air. Do not use cleaning agents.
How does the engine management system work?
The engine management system automatically adjusts the ignition timing depending on engine speed.
How do I adjust the carburetor?
Standard setting, turn H and L screws counterclockwise to stop, then turn H screw 1 turn clockwise and L screw 1 turn clockwise.
How do I make fine adjustments to the carburetor?
Turn the LA screw clockwise until the saw chain starts to move. Then turn the LA screw counterclockwise about 1/2 to 1 turn until the saw chain stops moving.
How do I check and replace the spark plug?
- Remove the spark plug boot.
- Unscrew the spark plug.
- Check the spark plug.
- Replace the spark plug if necessary.
When should I replace the spark plug?
Replace the spark plug after about 100 operating hours or earlier if the electrodes are badly eroded or heavily fouled. Only use suppressed spark plugs of the type approved by STIHL.
How do I check the spark gap?
The spark gap should be 0.5 mm.
How do I maintain the spark arresting screen in the muffler?
The spark arresting screen in the muffler should be cleaned periodically. If the engine loses power, the spark arresting screen may be clogged.
How do I remove the spark arresting screen?
Remove the screws that secure the spark arresting screen to the muffler. Remove the spark arresting screen from the muffler. Clean the spark arresting screen with a wire brush.
How do I clean the spark arresting screen?
Clean the spark arresting screen with a wire brush. Replace the spark arresting screen if it is damaged. Reinstall the spark arresting screen in the muffler.
How do I service and repair the muffler?
Have your muffler serviced and repaired by your STIHL servicing dealer only.
What do I do before storing the machine?
Before storing the machine, empty the fuel tank in a well-ventilated area. Dispose of fuel properly. Clean the machine thoroughly. Store the machine in a dry place, away from children.
How do I empty the fuel tank?
Empty the fuel tank in a well-ventilated area. Dispose of fuel properly.
How do I check and replace the chain sprocket?
- Remove the spark plug boot.
- Remove the muffler.
- Remove the cylinder cover.
- Remove the chain sprocket cover.
- Remove the chain sprocket.
- Check the chain sprocket.
- Replace the chain sprocket if necessary.
When should I replace the chain sprocket?
Replace the chain sprocket after every two saw chain replacements.
How do I maintain and sharpen the saw chain?
File the cutters, file the depth gauges, and check the chain tension.
How do I file the cutters?
Use a round file to file the cutters. The file should be held at the correct angle and depth.
How do I file the depth gauges?
Use a flat file to file the depth gauges. The file should be held at the correct angle and depth.
How do I check the chain tension?
The chain tension should be checked regularly. The chain should be tensioned so that it fits snugly against the underside of the bar.
What is the recommended filing angle?
The recommended filing angle is 30°.
What is the recommended depth gauge setting?
The recommended depth gauge setting is 0.65 mm (0.026 in).
What are the maintenance intervals?
Depending on the operating conditions and with the machine operated at the prescribed speed, the following maintenance intervals are recommended:
After each work session:
- Clean the machine, check the chain tension and adjust if necessary
- Remove the chain guard (scabbard), clean the chain saw and chain guard (scabbard), check chain for damage, check chain tension, lightly oil chain and chain guard (scabbard)
- Check tightness of nuts and screws, especially guide bar retaining nuts – retighten if necessary
- Check function of controls and safety devices
- Clean guide bar groove and oil hole, check guide bar for wear
Weekly:
- Clean the cylinder fins, check and clean air filter (clean more frequently when working in dusty conditions), check spark plug, check chain sprocket for wear
Monthly:
- Check and clean fuel tank and clean fuel filter, have authorized STIHL dealer inspect the chain brake
Annually:
- Have authorized STIHL dealer inspect the fuel system and replace fuel filter if necessary, inspect interior of muffler for carbon buildup and remove carbon deposits if necessary
How do I clean the machine?
Clean the machine with a damp cloth. Do not use solvents or strong detergents.
How do I check the chain tension?
The chain tension should be checked regularly. The chain should be tensioned so that it fits snugly against the underside of the bar.
How do I remove the chain guard?
Remove the chain guard by unscrewing the nuts that hold it in place.
How do I clean the chain saw and chain guard?
Clean the chain saw and chain guard with a damp cloth. Do not use solvents or strong detergents.
How do I check the chain for damage?
Check the chain for damage, such as cracks, missing teeth, or loose links.
How do I check the chain tension?
Check the chain tension to make sure it is properly adjusted.
How do I oil the chain and chain guard?
Lightly oil the chain and chain guard to prevent rust and corrosion.
How do I check the tightness of nuts and screws?
Check the tightness of nuts and screws, especially guide bar retaining nuts, and retighten if necessary.
How do I check the function of controls and safety devices?
Check the function of controls and safety devices, such as the throttle trigger, throttle trigger lockout, and chain brake.
How do I clean the guide bar groove and oil hole?
Clean the guide bar groove and oil hole to ensure proper chain lubrication.
How do I check the guide bar for wear?
Check the guide bar for wear, such as cracks, bending, or uneven wear.
How do I clean the cylinder fins?
Clean the cylinder fins to ensure proper engine cooling.
How do I check and clean the air filter?
Check and clean the air filter to ensure proper air flow to the engine. Clean more frequently when working in dusty conditions.
How do I check the spark plug?
Check the spark plug for wear, such as eroded electrodes or heavy fouling.
How do I check the chain sprocket for wear?
Check the chain sprocket for wear, such as worn teeth or cracks.
How do I check and clean the fuel tank?
Check and clean the fuel tank to remove any dirt or debris that may have accumulated.
How do I clean the fuel filter?
Clean the fuel filter to ensure proper fuel flow to the engine.
How do I inspect the chain brake?
Have an authorized STIHL dealer inspect the chain brake.
How do I inspect the fuel system?
Have an authorized STIHL dealer inspect the fuel system.
How do I replace the fuel filter?
Replace the fuel filter if necessary.
How do I inspect the interior of the muffler?
Inspect the interior of the muffler for carbon buildup and remove carbon deposits if necessary.
How do I maintain the engine?
Use only an oil specifically formulated and approved for use in 2-stroke air cooled engines. STIHL Premium 2-Cycle Engine Oil is specifically formulated to meet these requirements and offers the best overall protection. Always mix fuel and oil in a well ventilated area. Pour the oil into the fuel container first, then add gasoline. Close the fuel container and shake thoroughly to ensure the fuel and oil are properly mixed.
How do I properly dispose of my old equipment?
Follow all federal, state, and local regulations when disposing of the chain saw.
What preparations should I take before fueling?
- Before fueling, clean the filler cap and the area around it to ensure that no dirt falls into the tank.
- Always thoroughly shake the mixture in the canister before fueling your machine.
- Position the machine so that the filler cap is facing up.
How do I reduce the risk of fire and personal injury from escaping gas vapor and fumes?
Remove the fuel filler cap carefully so as to allow any pressure build-up in the tank to release slowly.
What do I do after fueling?
After fueling, tighten fuel cap as securely as possible by hand.
How often should I change the fuel pickup body?
Change the fuel pickup body every year.
How do I change the fuel pickup body?
- Open the filler cap and drain the fuel tank.
- Use a hook to pull the fuel pickup body out of the tank and take it off the hose.
- Push the new pickup body into the hose.
- Place the pickup body in the tank and close the filler cap.
What shouldn’t I do when changing the fuel pickup body?
Do not kink the fuel hose – do not use any sharp or pointed tools.
What kind of chain lubricant should I use?
For automatic and reliable lubrication of the chain and guide bar – use only an environmentally compatible quality chain and bar lubricant. Rapidly biodegradable STIHL BioPlus is recommended.
What can happen if I use biological chain oil that is not resistant to aging (e.g. STIHL BioPlus)?
It will otherwise quickly turn to resin. This results in hard deposits that are difficult to remove, especially in the area of the chain drive and chain. It may even cause the oil pump to seize.
What does the service life of the chain and guide bar depend on?
The service life of the chain and guide bar depends on the quality of the lubricant. It is therefore essential to use only a specially formulated chain lubricant.
Why shouldn’t I use waste oil?
Renewed contact with waste oil can cause skin cancer. Moreover, waste oil is environmentally harmful. Waste oil does not have the necessary lubricating properties and is unsuitable for chain lubrication.
How do I fill the chain oil tank?
- Thoroughly clean the filler cap and the area around it to ensure that no dirt falls into the tank.
- Always position the machine so that the filler cap is facing upwards.
- Open the filler cap.
- Refill the chain oil tank every time you refuel.
What if I have an oil pump with increased delivery rate (available option)?
Frequent checking and refilling of the oil tank is necessary – see “Adjusting oil quantity”. Refill the chain oil tank when the fuel tank is approximately half empty
How do I take care when filling with all versions of chain oil?
Take care not to spill chain oil during refilling and do not overfill the tank. Close the filler cap
What amount of chain oil should be left in the oil tank when the fuel tank is empty?
There must still be a small amount of chain oil in the oil tank when the fuel tank is empty.
What should I do if the oil tank is still partly full?
The reason may be a problem in the oil supply system: Check chain lubrication, clean the oil passages, contact your servicing dealer for assistance if necessary.
How do I check chain lubrication?
The saw chain must always throw off a small amount of oil.
What happens if I operate my saw without chain lubrication?
If the chain runs dry, the whole cutting attachment will be irretrievably damaged within a very short time. Always check chain lubrication and the oil level in the tank before starting work.
What should I do with a new chain?
Every new chain has to be broken in for about 2 to 3 minutes. After breaking in the chain, check chain tension and adjust if necessary see “Checking Chain Tension”.
How do I check and lock the chain with the chain brake?
The chain is stopped and locked when the hand guard is pushed toward the bar nose by the left hand – or when brake is activated by inertia in certain kickback situations.
How do I release the chain brake?
Pull the hand guard back toward the front handle.
When should I always disengage the chain brake?
Always disengage chain brake before accelerating engine and before starting cutting work. The only exception to this rule is when you check operation of the chain brake.
What will quickly damage the powerhead and chain drive (clutch, chain brake)?
High revs with the chain brake engaged (chain locked).
When does the chain brake only operate?
The chain brake will operate only if it has been properly maintained and the hand guard has not been modified in any way.
How do I check the operation of the chain brake?
Before starting work: Run engine at idle speed, engage the chain brake (push hand guard toward bar nose). Accelerate up to full throttle for no more than 3 seconds – the chain must not rotate. The hand guard must be free from dirt and move freely.
How often should I conduct chain brake maintenance?
The chain brake is subject to normal wear. It is necessary to have it serviced and maintained regularly by trained personnel, such as your STIHL servicing dealer, at the following intervals:
- Full-time usage: every 3 months
- Part-time usage: every 6 months
- Occasional usage: every 12 months
What if I’m operating the equipment in winter operation at temperatures below +50 °F (+10 °C)?
Remove the carburetor box cover. In the carburetor box cover, move the slide (1) from summer position to winter position (2).
What happens when heated air is drawn in from around the cylinder and mixed with cold air?
This helps prevent carburetor icing.
What should I do above +70 °F (+20 °C)?
Always return the cover to the position for “summer operation” again! Risk of engine malfunction – overheating! Replace the carburetor box cover and tighten the knob.
What should I do if I need to retrofit a new air filter?
See “Air filter system”
What should I do at temperatures below +14 °F (-10 °C)?
Under extreme winter conditions (temperatures below +14 °F (-10 °C), powdered or drifting snow), it is recommended to mount the cover plate (special accessory) on the fan housing.
What does the partial covering of the slits in the fan housing do?
The partial covering of the slits in the fan housing keeps out powdered or drifting snow.
What position should the slide be in when the cover plate is mounted?
When the cover plate is mounted, the slide must be in winter position in the carburetor box cover.
What should I do if the chain saw is extremely cold (frost formation)?
After starting, bring the engine up to operating temperature at increased idle speed (disengage chain brake!)
What should I do if engine trouble occurs?
First check whether use of the cover plate is necessary.
How do I switch on the handle heating system (depending on equipment version)?
To switch on, set switch to I and to switch off, return switch to the 0 position.
What’s the maintenance on the heating system?
Overheating during continuous use is impossible. The heating system is maintenance-free.
What are the positions of the Master Control Lever for starting/stopping the engine?
- Stop 0 – engine off – the ignition is switched off
- Normal run position (I) – engine runs or can fire.
- Starting throttle ()() – this position is used to start a warm engine. The Master Control lever moves to the normal run position as soon as the throttle trigger is squeezed.
- Choke shutter closed (||) – this position is used to start a cold engine.
How do I move the Master Control lever?
To move the Master Control lever from the normal run position (I) to choke closed (), press down the throttle trigger lockout and squeeze the throttle trigger at the same time and hold them in that position – now set the Master Control lever.
How do I select the starting throttle position?
To select the starting throttle position ()(), move the Master Control lever to choke closed (||) first, then push it into the starting throttle position ()().
What position must the Master Control lever be in for the changeover to the starting throttle position?
The Master Control lever must be in the choke closed position (1) for the changeover to the starting throttle position ()().
How does the Master Control lever move from the starting throttle position to the run position?
The Master Control lever moves from the starting throttle position ()() to the run position (I) when you press down the throttle trigger lockout and blip the throttle trigger at the same time.
How do I switch off the engine?
To switch off the engine, move the Master Control lever to Stop (0).
When should I use the choke shutter closed position ()?
- if the engine is cold
- if the engine stalls when you open the throttle after starting.
- if the fuel tank was run until empty (engine stopped).
When should I use the starting throttle position ()()?
- if the engine is warm, i.e. if it has been running for about one minute.
- after engine begins to fire,
- after clearing a flooded combustion chamber.
How do I hold the saw when starting on the ground?
- Place your saw on the ground. Make sure you have a firm footing – check that the chain is not touching any object or the ground.
- Hold the saw firmly on the ground with your left hand on the front handle – your thumb should be under the handle.
- Put your right foot into the rear handle and press down.
How do I hold the saw when starting between knees or thighs?
- Hold the rear handle tightly between your legs, just above the knees.
- Hold the front handle firmly with your left hand – your thumb should be under the handle.
How do I start the saw?
- Pull the starter grip slowly with your right hand until you feel it engage – and then give it a brisk strong pull and push down the front handle at the same time. Do not pull out the starter rope to full length – it might otherwise break. Do not let the starter grip snap back. Guide it slowly back into the housing so that the starter rope can rewind properly.
- Press in the button to open the decompression valve.
- Push the hand guard (1) forward – the chain is locked.
- Press down the trigger lockout (2) and pull the throttle trigger (3) at the same time. Set Master Control lever (4) to:
- Choke shutter closed () if the engine is cold (also use this position if the engine stopped when you opened the throttle after starting)
- Starting throttle position ()() if the engine is warm, i.e. if it has been running for about one minute.
- Hold and start your saw as described.
What should I do with machines without additional manual fuel pump?
If the engine is new or after a long out-of-service period, it may be necessary to pull the starter rope several times to prime the fuel system.
What should I do as soon as the engine runs?
Press down trigger lockout and the blip the throttle trigger (2) – the Master Control lever (1) moves to the run position (I) and the engine settles down to idling speed.
What do I do after pulling the hand guard back toward the front handle?
The chain brake is now disengaged – your saw is ready for operation.
When should I always disengage the chain brake?
Always disengage chain brake before accelerating the engine. High revs with the chain brake engaged (chain locked) will quickly damage the clutch and chain brake.
What do I do at very low outside temperatures?
- Allow engine to warm up at part throttle.
- Change over to winter operation if necessary – see “Winter Operation”.
How do I stop the engine?
Move the Master Control lever to the stop position (0).
What should I do if the engine does not start?
If you did not move the Master Control lever from the choke closed position () to the starting throttle position ()() quickly enough after the engine began to fire, the combustion chamber may be flooded.
- Move the Master Control lever to the stop position (0).
- Remove the spark plug – see “Spark Plug”.
- Dry the spark plug.
- Crank the engine several times with the starter to clear the combustion chamber.
- Refit the spark plug – see “Spark Plug”.
- Set Master Control lever to the starting throttle position ()() – even if the engine is cold.
- Press the button to open the decompression valve.
- Now start the engine.
What shouldn’t I do during the break-in period?
A factory new machine should not be run at high revs (full throttle off load) for the first three tank fillings. This avoids unnecessarily high loads during the break-in period. As all moving parts have to bed in during the break-in period, the frictional resistances in the shortblock are greater during this period. The engine develops its maximum power after about 5 to 15 tank fillings.
What shouldn’t I do during work?
Do not make the mixture leaner to achieve an apparent increase in power – this could damage the engine – see “Adjusting the Carburetor”. Open the throttle only when the chain brake is off. Running the engine at high revs with the chain brake engaged (chain locked) will quickly damage the shortblock and chain drive (clutch, chain brake).
How often should I check chain tension?
A new saw chain must be retensioned more frequently than one that has been in use already for an extended period.
What is correct chain tension (cold)?
Tension is correct when the chain fits snugly against the underside of the bar but can still be pulled along the bar by hand. Retension if necessary – see “Tensioning the Saw Chain”.
What happens to the chain at operating temperature?
The chain stretches and begins to sag. The drive links must not come out of the bar groove on the underside of the bar – the chain may otherwise jump off the bar. Retension the chain see “Tensioning the Saw Chain”.
What happens to the chain as it cools down?
The chain contracts as it cools down. If it is not slackened off, it can damage the crankshaft and bearings.
What should I do after a long period of full-throttle operation?
After a long period of full-throttle operation, allow engine to run for a while at idle speed so that the heat in the engine can be dissipated by flow of cooling air. This protects engine-mounted components (ignition, carburetor) from thermal overload.
What should I do after finishing work?
Slacken off the chain if you have retensioned it at operating temperature during work. Always slacken off the chain again after finishing work. The chain contracts as it cools down. If it is not slackened off, it can damage the crankshaft and bearings.
How do I short-term store the machine?
Wait for engine to cool down. Keep the machine with a full tank of fuel in a dry place, well away from sources of ignition, until you need it again.
How do I long-term store the machine?
See “Storing the machine”
How do I control the oil quantity?
Varying cutting lengths, types of wood and working techniques require varying quantities of oil. The oil delivery rate can be adjusted as needed using the adjusting screw (1) (on the bottom of the machine).
What is the Ematic setting (E)?
Moderate oil delivery rate – Turn adjusting screw to “E” (Ematic setting) Increase oil delivery rate
- Turn the adjusting screw clockwise
How do I reduce oil delivery rate?
- Turn the adjusting screw counterclockwise
How do I take care of the guide bar?
- Turn the guide bar over – every time you sharpen the chain and every time you replace the chain – this helps avoid one-sided wear, especially at the nose and underside of the bar.
- Regularly clean the oil inlet hole (1), the oilway (2) and the bar groove (3).
- Measure the groove depth – with the scale on the filing gauge (special accessory) – in the area used most for cutting.
What do I do if groove depth is less than specified?
- Replace the guide bar.
- The drive link tangs will otherwise scrape along the bottom of the groove – the cutters and tie straps will not ride on the bar rails.
What should I do if there is a noticeable loss of engine power?
- Knock out the filter or blow it clear with compressed air from the inside outwards
- If knocking-out or blowing-out does not suffice, or in the case of stubborn dirt or stuck filter fabric, the filter must be subjected to a thorough cleaning. Always replace a damaged filter.
How do I conduct thorough filter cleaning?
- Wash the filter in STIHL special-purpose cleaner (special accessory) or a clean, non-flammable cleaning liquid (e.g., warm soapy water) – rinse the filter from inside to out under a water jet – do not use high-pressure cleaners
- Dry all filter parts – do not expose to extreme heat
- Do not oil the filter
- Reinstall filter
How do I adjust the carburetor?
General Information The carburetor comes from the factory with a standard setting. This setting provides an optimum fuel-air mixture under most operating conditions. Changing the setting of the high speed screw alters the engine’s power output and the maximum off-load engine speed.
Standard Setting
- Shut off the engine.
- Check the air filter and clean or replace if necessary.
- Check the spark arresting screen (not in all models, country-specific) in the muffler and clean or replace if necessary.
Carburetors with H = 1 and L = 1
- Carefully screw both adjusting screws down onto their seats (clockwise).
- Turn the high speed screw (H) one full turn counterclockwise.
- Turn the low speed screw (L) one full turn counterclockwise.
Carburetors with H = 3/4 and L = 1/4
- Turn high speed screw (H) counterclockwise as far as stop (no more than 3/4 turn).
- Turn the low speed screw (L) carefully clockwise as far as stop, then turn it back 1/4 turn.
Adjusting Idle Speed
- Carry out the standard setting.
- Start and warm up the engine.
Engine stops while idling
- Turn the idle speed screw (LA) clockwise until the chain begins to run – then back it off 1/4 turn.
Saw chain runs while engine is idling
- Turn the idle speed screw (LA) counterclockwise until the chain stops moving – then turn it another 1/4 turn in the same direction.
What do I do if the chain continues moving when the engine is idling?
Have your saw checked and repaired by your servicing dealer.
What do I do with erratic idling behavior or poor acceleration (even though standard setting of low speed screw is correct)?
Idle setting is too lean.
- Turn the low speed screw (L) counterclockwise, no further than stop on carburetors with L = 1/4, until the engine runs and accelerates smoothly.
What do I do when I need to fine tune operation at high altitude?
A slight correction of the setting may be necessary if engine does not run satisfactorily:
- Carry out the standard setting.
- Warm up the engine.
- Turn the high speed screw (H) slightly clockwise (leaner). On carburetors with H = 3/4, turn no further than stop.
What should I do when returning from high altitude?
Reset the carburetor to the standard setting. If the setting is too lean there is a risk of engine damage due to insufficient lubrication and overheating.
What should I do if engine performance deteriorates?
Check the spark arresting screen in the muffler.
How do I remove and clean the spark arresting screen in the muffler?
- Let the muffler cool down Version A
- Remove four screws
- Remove exhaust casing (1) of the muffler
To clean or replace:
- Clean the dirty spark arresting screen, replace if damaged or heavily carbonized
- Refit the spark arresting screen in reverse order of steps
Version B
- Remove screw (1)
- Lift and pull out the spark arresting screen (2)
- Clean the dirty spark arresting screen, replace if damaged or heavily carbonized
- Refit the spark arresting screen in reverse order of steps
- Check second spark arresting screen – as with Version A
- Bend back the retaining lugs (2)
- Pull out spark arresting screen (3)
What do I do if engine is down on power, difficult to start or runs poorly at idling speed?
First check the spark plug.
When do I fit a new spark plug?
Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded.
What factors affect the condition of the spark plug?
Wrong fuel mix (too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. These factors cause deposits to form on the insulator nose which may result in trouble in operation.
How do I remove the spark plug?
- Move the Master Control lever to the stop position 0
- Turn the knob above the rear handle in the direction of the arrow and remove the carburetor box cover
- Lift the air baffle (1) up and off
- Unplug spark plug boot (2)
- Unscrew spark plug
How do I check the Spark Plug?
- Clean dirty spark plug.
- Check electrode gap (A) and readjust if necessary – see “Specifications.”
- Use only resistor type spark plugs of the approved range.
To fix fouling of spark plug:
- too much oil in fuel mix,
- dirty air filter,
- unfavorable running conditions, e.g. operating at part load.
How do I install spark plug?
- Screw in the spark plug and press on the spark plug boot
- Install air baffle
- Mount carburetor box cover
How do I help prolong the wear life of the starter rope?
Observe the following points:
- Pull the starter rope only in the direction specified.
- Do not pull the rope over the edge of the guide bushing.
- Do not pull out the rope more than specified.
- Do not allow the starter grip to snap back, guide it back into the housing slowly – see chapter on “Starting / Stopping the Engine.”
What should I do when the starter rope is damaged?
Have a damaged starter rope replaced by your dealer before it breaks completely. STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer.
How do I store the machine for periods of 3 months or longer?
- Drain and clean the fuel tank in a well ventilated area.
- Dispose of fuel properly in accordance with local environmental requirements.
- Run the engine until the carburetor is dry – this helps prevent the carburetor diaphragms sticking together.
- Remove the saw chain and guide bar, clean them and spray with corrosion inhibiting oil.
- Thoroughly clean the machine – pay special attention to the cylinder fins and air filter.
- If you use a biological chain and bar lubricant, e.g. STIHL BioPlus, completely fill the chain oil tank.
- Store the machine in a dry, high or locked location, out of the reach of children and other unauthorized persons.
How do I check and replace the chain sprocket?
- Remove chain sprocket cover, saw chain and guide bar.
- Release chain brake – pull hand guard against the front handle
To fit new chain sprocket:
- after use of two saw chains or earlier
- if the wear marks (arrows) are deeper than 0.02 in (0.5 mm) otherwise the service life of the saw chain is reduced – use check gauge (special accessory) to test
- Using two saw chains in alternation helps preserve the chain sprocket.
- Use only STIHL original chain sprockets to help ensure reliable functioning of the chain brake.
How do I install a spur chain sprocket / rim sprocket?
- Clean crankshaft stub and needle cage and lubricate with STIHL lubricant (special accessory)
- Slide needle cage onto the crankshaft stub
- After refitting, turn the clutch drum and/or spur chain sprocket approx. 1 full turn so that the carrier for the oil pump drive engages
- Refit the rim sprocket – cavities toward the outside
- Refit washer and E-clip on the crankshaft
How do I saw effortlessly with a properly sharpened saw chain?
A properly sharpened saw chain cuts through wood effortlessly even with very little pushing.
What should I do when I have a dull or damaged saw chain?
Never use a dull or damaged saw chain this leads to increased physical strain, increased vibration load, unsatisfactory cutting results and increased wear.
- Clean the saw chain
- Check the saw chain for cracks and damaged rivets
- Replace damaged or worn chain components and adapt these parts to the remaining parts in terms of shape and level of wear – rework accordingly
How often do I sharpen?
Sharpen frequently, removing little material – two or three strokes of the file are usually sufficient for simple resharpening. What happens after sharpening, clean the saw chain thoroughly, removing any filings or grinding dust – lubricate the saw chain thoroughly. In the event of extended periods of disuse, store saw chains in cleaned and oiled condition
When is it necessary to install a new chain?
Compliance with the angles and dimensions listed below is absolutely necessary. An improperly sharpened saw chain – especially depth gauges that are too low can lead to increased kickback tendency of the chain saw – risk of injury! Chain pitch marking (a) is embossed in the area of the depth gauge of each cutter.
What sharpening tools (special accessories) are used?
- Select sharpening tools in accordance with chain pitch
- Clamp guide bar if necessary
- Block saw chain – push the hand guard forward
How do I advance the saw chain?
To advance the saw chain, pull the hand guard toward the handlebar: The chain brake is disengaged. With the Quickstop Plus chain brake system, additionally press the throttle trigger lockout.
How do I use file to sharpen?
- markings on the file holder – rest the file holder on the tooth head and the depth gauge
- File only from the inside outward
- The file only sharpens on the forward stroke – lift the file on the backstroke
- Do not file tie straps and drive links
- Rotate the file a little periodically in order to avoid uneven wear
- To remove file burr, use a piece of hardwood
- Check angle with file gauge
- All cutters must be equally long.
- With varying cutter lengths, the cutter heights also vary and cause rough running of the saw chain and chain breakage.
What is the correct angle to guide file and what is it’s purpose?
- Guide the file: horizontally (at a right angle to the side surface of the guide bar) in accordance with the specified angle – according to the
- The depth gauge determines the depth to which the cutter penetrates the wood and thus the chip thickness.
- All cutters must be filed down equal to the length of the shortest cutter – ideally, one should have this done by a servicing dealer using an electric sharpener
How do I lower the depth gauges?
The depth gauge setting is lowered when the cutter is sharpened. Check the depth gauge setting after each sharpening
- Lay the appropriate file gauge (1) for the chain pitch on the saw chain and press it against the cutter to be checked – if the depth gauge protrudes past the file gauge, the depth gauge must be reworked.
- Afterwards, dress the leading edge of the depth gauge parallel to the service mark (see arrow) – when doing this, be careful not to further lower the highest point of the depth gauge
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