STIHL MS 170, 180 Instruction Manual
English © ANDREAS STIHL AG & Co. KG, 2020 0458-207-8321-B. VA2.J20. 0000006694_008_GB Printed on chlorine-free paper Printing inks contain vegetable oils, paper can be recycled.
English Intake air baffle: winter operation Guide to Using this Manual This Instruction Manual refers to a STIHL chain saw, also called a machine in this Instruction Manual. Intake air baffle: summer operation Pictograms Handle heating Pictograms that appear on the machine are explained in this Instruction Manual.
English Safety Precautions Special safety precautions must be observed to reduce the risk of personal injury when working with a chain saw because of the very high chain speed and very sharp cutters. It is important that you read the instruction manual before first use and keep it in a safe place for future reference. Nonobservance of the instruction manual may result in serious or even fatal injury. General Observe all applicable local safety regulations, standards and ordinances.
English Wear sturdy protective gloves made of a resistant material (e.g. leather). Clean the dust and dirt off the machine – do not use any grease solvents for this purpose. Open the fuel filler cap carefully so that any excess pressure is relieved gradually and fuel does not splash out. Clean the ventilation slots if necessary. The machine may only be refuelled in a well ventilated place. Clean the machine immediately if fuel is spilled.
English – Check operation of chain brake, front hand guard – Correctly mounted guide bar – Correctly tensioned chain – The trigger and trigger lockout must move freely and spring back to the idle position when they are released. – – Master Control lever must move easily to STOP, 0 or † Check that the spark plug boot is secure – a loose boot may cause arcing that could ignite combustible fumes and cause a fire. – Never attempt to modify the controls or safety devices in any way.
English Examine the saw chain periodically at short intervals and as soon as you note any tangible changes: a machine that is not in perfect working order. In case of doubt, have the unit checked by your servicing dealer. – Switch off the engine; wait until the saw chain is stationary – Check condition and secure fitting – Check sharpness Check for correct idling, so that the saw chain stops moving when the throttle trigger is released. Check the idle setting regularly and correct when possible.
English Maintenance and repairs Check ignition lead (insulation in good condition, secure connection). Always switch off the engine before any repair, cleaning or maintenance work and any work on the chain. Risk of injury if the engine starts inadvertently! Check that the muffler is in perfect working condition. Exception: adjustment of carburettor and idle speed. The machine must be serviced regularly. Do not attempt any maintenance or repair work not described in the Instruction Manual.
English Kickback occurs if, for example, The most common reactive forces are: kickback, pushback and pull-in. 001BA257 KN Dangers of kickback Kickback can result in fatal cuts. – – The saw chain in the area of the upper quarter of the guide bar nose unintentionally comes into contact with wood or a solid object – e. g.
English Dead wood (brittle, rotten or dead wood) poses a significant, highly unpredictable hazard. It is extremely difficult or even practically impossible to recognise the danger. Use aids such as winches or draglines. be drawn forward toward the log – to avoid this, engage the bumper spike firmly in the wood. Pushback (B) B 001BA038 KN When felling close to roads, rail lines, power lines, etc., work with particular care. If necessary, notify police, power companies or railway authorities.
English Note when reaching the end of a cut that the saw is no longer supported in the kerf. You have to take the full weight of the machine since it might otherwise go out of control. materials, dry plants or scrub. Always contact your local forest authority for information on a possible fire risk. 001BA082 KN When cutting small logs: – Use a sturdy and stable support – sawhorse. Position the saw so that your body is clear of the cutting attachment. – Never hold the log with your leg or foot.
English Ripping cut: 1 1/ 2 21/2 001BA088 LÄ 2 001BA151 KN 1 1 Maintain a distance of at least 2 1/2 tree lengths from the next felling site. 2 N Make relieving cut at the compression side (1) Make bucking cut at the tension side (2) Be wary of pushback when making bucking cut from the bottom upwards (underbuck). NOTICE Do not cut a lying log at a point where it is touching the ground because the saw chain will otherwise be damaged.
English Preparing work area at base of tree B – – 45° A Felling notch First clear the tree base and work area from interfering limbs and brush to provide a secure footing. Preparing the felling notch Carefully clear the base of the trunk (e.g., with an axe) – sand, stones and other foreign objects will blunt the saw chain C – Establish escape paths for each worker – approx.
English Determine direction of fall with gunning sight on cover and fan housing Checking the direction of fall felling notch to a depth of about 1/10 of trunk diameter. On large diameter trees, cut to no more than width of guide bar. Your chainsaw has a gunning sight on the cover and fan housing. Use this gunning sight. Making the felling notch When making a felling notch, align the chainsaw so that the notch lies at a right angle to the direction of fall.
English The tree is felled with the felling cut (E). – Cut horizontally – 1/10 (at least 3 cm) of tree diameter higher than bottom of felling notch (C). The holding strap (F) or stabilizing strap (G) supports the tree and helps prevent it from falling prematurely. – Width of strip: approx. 1/10 to 1/5 of the trunk diameter – Do not cut into the strip during the felling cut – With rotten trunks, leave a wider strip 1.
English Felling cut with stabilizing strap (normal tree) – Do not cut into the stabilizing strap A) Thin trunks 1. Implement this felling cut when the trunk diameter is smaller than the cutting length of the chainsaw. 2. 3. 3. 5. 001BA263 KN 4. 1. 001BA273 KN 2. 001BA261 KN N Shout a warning before starting the felling cut. Set the felling wedge (3) Shout a second warning immediately before the tree falls.
English N Plunge cut the felling cut N Make the felling cut up to the hinge (4) – Do not cut into the hinge N Make the felling cut up to the stabilizing strap (5) 2. 001BA274 KN 6. N N Plunge cut the guide bar into the trunk until it exits on the other side Shout a second warning immediately before the tree falls.
English The felling cut must be continued on the opposite side of the trunk. B) Thick trunks Ensure that the second cut is at the same level as the first cut. 1. 2.
English Chain Scabbard Cutting Attachment Mounting the Bar and Chain (front chain tensioner) A cutting attachment consists of the saw chain, guide bar and chain sprocket. a – – 3 The pitch (t) of the saw chain (1), chain sprocket and the nose sprocket of the Rollomatic guide bar must match. Your saw comes standard with a chain scabbard that matches the cutting attachment.
English Disengage the chain brake. Mounting the Bar and Chain (quick chain tensioner) 001BA186 KN 2 N Pull the hand guard towards the front handle until there is an audible click – the chain brake is disengaged. 143BA003 KN Fitting the chain N 1 4 Removing the chain sprocket cover Fit the guide bar over the studs (1) – the cutting edges on the top of the bar must point to the right.
English Releasing the chain brake N Fit the saw chain – starting at the nose of the guide bar – pay attention to the position of the tensioning gear and the cutting edges N Turn tensioning gear (1) to the right as far as possible N Turn the guide bar so that the tensioning gear faces the user Remove screw (2) 1 3 N 2310BA016 KN N Pull hand guard towards the front handle until it engages audibly – chain brake is released 2 3 181BA013 KN N 001BA186 KN 2310BA015 KN 2 Fitting the saw chain P
English turn the adjusting wheel (4) a little until the chain sprocket cover can be slid completely against the engine housing N Swing grip (5) into position (until it engages) N Fit wing nut and tighten lightly N Next step: see "Tensioning the Saw Chain" Tensioning the Saw Chain (front chain tensioner) 143BA045 KN N 1 135BA011 KN Retensioning during cutting work: N Guide the drive link into the bar groove (see arrow) and turn the tensioning gear to the left as far as possible N Fit chain sp
English Tensioning the Saw Chain (quick chain tensioner) Checking Chain Tension Fuel Your engine requires a mixture of gasoline and engine oil. 1 Retensioning during cutting work: 143BA007 KN 001BA112 KN 2 WARNING N Shut off the engine. N Shut off the engine. N N Pull out the hinged clip and loosen the wingnut. Wear work gloves to protect your hands. N 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.
English Engines equipped with M-Tronic deliver full power when run on gasoline with an ethanol content of up to 25% (E25). Engine Oil If you mix the fuel yourself, use only STIHL two-stroke engine oil or another high-performance engine oil in accordance with JASO FB, JASO FC, JASO FD, ISO-L-EGB, ISO-L-EGC or ISO-L-EGD. STIHL specifies STIHL HP Ultra twostroke engine oil or an equivalent highperformance engine oil in order to maintain emission limits over the machine’s service life.
English Fuel pick-up body replacement Chain Lubricant 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.
English Checking Chain Lubrication Chain Brake Locking the chain 143BA024 KN If the oil level in the tank does not go down, the reason may be a fault in the oil supply system: Check chain lubrication, clean the oilways, contact your dealer for assistance if necessary STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. 143BA011 KN The saw chain must always throw off a small amount of oil.
English The chain brake will operate only if the hand guard has not been modified in any way. Releasing the chain brake Check operation of the chain brake Before starting work: Run engine at idle speed, engage the chain brake (push hand guard toward bar nose) and open the throttle wide for no more than 3 seconds – the chain must not rotate. The hand guard must be free from dirt and move freely.
English Adjusting the master control lever Holding the chain saw To adjust the master control lever from run F to cold start l, press and hold down the throttle trigger lockout and throttle trigger simultaneously – set master control lever. There are two ways to hold the chain saw during starting. Between the knees or thighs On the ground To set the master control lever to warm start n, first set it to cold start l, then push the master control lever into the warm start n position.
English Versions with ErgoStart Starting For all versions The ErgoStart stores the energy for starting the chain saw. For this reason, a few seconds may pass between the pulling of the starter rope and the starting of the engine.
English N Move the master control lever to the stop position 0 N Remove the spark plug - see "Spark plug" N Dry the spark plug N Pull the hand guard toward the handlebar Crank the engine several times with the starter – to clear the combustion chamber N The chain brake is released - the chain saw is ready for use.
English Operating Instructions 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.
English Taking Care of the Guide Bar Picco Rapid Rapid 3/8“ P 5.0 mm 3/8“; 0.325“ 6.0 mm 0.404“ 7.0 mm If the groove is not at least this deep: N Shroud Removing the shroud Replace guide bar Otherwise the drive links will grind against the base of the groove – the bottoms of the cutters and the tie straps will not lie against the bar.
English Cleaning the Air Filter N Adjusting the Carburetor Basic information If there is a noticeable loss of engine power Simultaneously press the throttle trigger lockout and throttle trigger and set the Master Control lever to cold start l N Clean away loose dirt from around the filter N Remove the shroud – see "Shroud" Saw chain rotates at idle speed: The carburetor has been factoryadjusted to provide the engine with a optimal fuel-air mixture in all operating states.
English N If the engine is down on power, check the spark arresting screen in the muffler. N If the engine is down on power, difficult to start or runs poorly at idle speed, first check the spark plug. N Fit a new spark plug after about 100 operating hours – or sooner if the electrodes are badly eroded. Install only suppressed spark plugs of the type approved by STIHL – see "Specifications". Wait for the muffler to cool down.
English Use resistor type spark plugs with a properly tightened adapter nut. Installing the spark plug N Install the spark plug and connect the spark plug boot (press it down firmly) – reassembly all other parts in the reverse sequence. Storing the Machine For periods of 3 months or longer N N N Drain and clean the fuel tank in a well ventilated area. Remove chain sprocket cover, saw chain and guide bar. N Dispose of fuel properly in accordance with local environmental requirements.
English N Use a screwdriver to remove the Eclip N Remove washer N Remove the chain sprocket together with the needle cage from the crankshaft Install chain sprocket N Clean crankshaft stub and needle cage and lubricate with STIHL lubricant (special accessory) N Slide needle cage onto the crankshaft stub N After refitting, turn the chain sprocket approx.
English File holder Proper sharpening N Select sharpening tools in accordance with chain pitch N Clamp guide bar if necessary N 689BA025 KN Block saw chain – push the hand guard forward N Always use a file holder (special accessory, see table "Sharpening tools") when sharpening saw chains by hand. File holders have markings for the sharpening angle. To advance the saw chain, pull the hand guard toward the handlebar: The chain brake is disengaged.
English N File only from the inside outward N The file only sharpens on the forward stroke – lift the file on the backstroke Do not file tie straps and drive links N Rotate the file a little periodically in order to avoid uneven wear N To remove file burr, use a piece of hardwood N 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.
English WARNING N After sharpening, clean the saw chain thoroughly, removing any filings or grinding dust – lubricate the saw chain thoroughly N In the event of extended periods of disuse, store saw chains in cleaned and oiled condition 689BA052 KN Depth gauges that are too low increase the kickback tendency of the chain saw.
English Complete machine Visual inspection (condition, leaks) Manual fuel pump (if present) Fuel pick-up body / filter in fuel tank X Clean Function test X X X X X Have checked by dealer check X Have repaired by a specialist dealer1) X check X Clean, replace filter insert X X X Fuel tank Clean X Lubricating oil tank Clean X Chain lubrication check X Check, pay attention to sharpness X X Checking the chain tension X X X sharpen Check (wear, damage) Guide bar X X X repla
Anti-vibration elements check X Clean X Check idle adjustment – saw chain must not rotate X Chain catcher Safety information label As required If damaged If faulty X X X X Set the idle speed; if required have the chainsaw repaired by a specialist dealer1) X Adjust electrode gap X Replace after 100 hours of operation Tighten2) X Have checked by dealer1) Spark arresting screen in muffler Annually X Clean Accessible screws and nuts (except adjusting screws) Monthly X Cylinder fins S
English Main Parts 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 # 11 6 12 7 4 1 2 6 3 5 8 9 10 7 16 15 17 18 22 19 23 13 # 21 20 MS 170, MS 170 C, MS 180, MS 180 C 24 207BA031 KN 14 Shroud catch Carburetor adjusting screw Chain brake Muffler with spark arresting screen Chain sprocket Chain sprocket cover Chain catcher Chain tensioner (frontal) Guide bar Oilomatic saw chain Adjusting wheel (quick tensioner) Handle Oil filler cap Bumper spike Front hand guard Front ha
English All position diaphragm carburetor with integral fuel pump Engine Fuel tank capacity: STIHL single cylinder two-stroke engine MS 170, MS 170 C Displacement: Cylinder bore: Piston stroke: Engine power according to ISO 7293: Idle speed:1) 1) Weight 31.8 cm3 38 mm 28 mm 1.5 kW (2.0 HP) at 9000 rpm 2800 rpm Oil tank capacity: 145 cm3 (0.145 l) Dry, without cutting attachment MS 170: MS 170 C with ErgoStart: MS 180: MS 180 C with quick tensioner and ErgoStart: 3.9 kg 4.2 kg 3.9 kg 4.
English Sound and vibration levels REACH For further details concerning compliance with the Physical Agents Directive Vibration 2002/44/EC, see www.stihl.com/vib REACH is an EC regulation and stands for the Registration, Evaluation, Authorisation and Restriction of Chemical substances. Sound pressure level Lpeq to ISO 22868 For information on compliance with the REACH regulation (EC) No. 1907/2006 see www.stihl.com/reach.
English Users of this machine may only carry out the maintenance and service work described in this user manual. All other repairs must be carried out by a servicing dealer. STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information.
English Guaranteed sound power level all MS 170: all MS 180: 111 dB(A) 112 dB(A) The EC type examination was carried out by DPLF Deutsche Prüf- und Zertifizierungsstelle für Land- und Forsttechnik GbR (NB 0363) Spremberger Straße 1 D-64823 Groß-Umstadt Certification No. all MS 170: all MS 180: K-EG 2009/3408 K-EG 2009/3409 Technical documents deposited at: ANDREAS STIHL AG & Co. KG Produktzulassung The year of manufacture and serial number are applied to the product. Done at Waiblingen, 03.02.
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