Stihl 181 C Manual
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MS 171, MS 181, MS 181 C, MS 211, MS 211 C English 49 NRemove chain sprocket cover, saw chain and guide bar. NRelease chain brake – pull hand guard against the front handle 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.NUse a screwdriver to remove the E- clip (1) NRemove the washer (2) NRemove rim sprocket (3) (if so equipped), clutch drum (4) and needle cage (6). NInspect transport profile for rim sprocket on the clutch drum (4) – if there are also heavy signs of wear, also replace the clutch drum NRemove clutch drum with integrated spur chain sprocket (5) (if so equipped) including needle cage (6) from the crankshaft – for powerheads with Quickstop Plus chain brake system, depress throttle trigger lockout beforehand Install spur chain sprocket / rim sprocket NClean crankshaft stub and needle cage and lubricate with STIHL lubricant (special accessory) NSlide needle cage onto the crankshaft stub NAfter refitting, turn the clutch drum and/or spur chain sprocket approx. 1 full turn so that the carrier for the oil pump drive engages NRefit the rim sprocket – cavities toward the outside NRefit washer and E-clip on the crankshaftChecking and Replacing the Chain Sprocket 001BA121 KN 001BA122 KN 1 2 45 61 2 3 6
MS 171, MS 181, MS 181 C, MS 211, MS 211 C English 50 Sawing effortlessly with a properly sharpened saw chain A properly sharpened saw chain cuts through wood effortlessly even with very little pushing. Never use a dull or damaged saw chain – this leads to increased physical strain, increased vibration load, unsatisfactory cutting results and increased wear. NClean the saw chain NCheck the saw chain for cracks and damaged rivets NReplace damaged or worn chain components and adapt these parts to the remaining parts in terms of shape and level of wear – rework accordingly Carbide-tipped (Duro) saw chains are especially wear-resistant. For an optimal sharpening result, STIHL recommends STIHL servicing dealers. WARNING 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 The chain pitch marking (a) is embossed in the area of the depth gauge of each cutter. The diameter of file to be used depends on the chain pitch – see table "Sharpening tools". The angles of the cutter must be maintained during resharpening.Sharpening and side plate angles ASharpening angle STIHL saw chains are sharpened with a 30° sharpening angle. Ripping chains, which are sharpened with a 10° sharpening angle, are exceptions. Ripping chains have an X in the designation. BSide plate angle The correct side plate angle results automatically when the specified file holder and file diameter are used. The angles must be identical for all cutters in the saw chain. Varying angles: Rough, uneven running of the saw chain, increased wear – even to the point of saw chain breakage.Maintaining and Sharpening the Saw Chain Marking (a)Chain pitch Inches mm 71/4P6.35 1 or 1/4 1/4 6.35 6, P or PM 3/8 P 9.32 2 or 325 0.325 8.25 3 or 3/8 3/8 9.32 4 or 404 0.404 10.26 689BA027 KN a 7RRWKVKDSHV $QJOH r $% 0LFUR VHPLFKLVHOWRRWK H J 30 50 50 6XSHU IXOOFKLVHOWRRWK H J 36 56 56 5LSSLQJFKDLQH J 30; 50; A B 689BA021 KN
MS 171, MS 181, MS 181 C, MS 211, MS 211 C English 51 File holder NUse a file holder 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. Use only special saw chain files! Other files are unsuitable in terms of shape and type of cutting. To check the angles STIHL filing gauge (special accessory, see table "Sharpening tools") – a universal tool for checking sharpening and side plate angles, depth gauge setting, and tooth length, as well as cleaning grooves and oil inlet holes. Proper sharpening NSelect sharpening tools in accordance with chain pitch NClamp guide bar if necessary NBlock saw chain – push the hand guard forward NTo 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 NSharpen frequently, removing little m a t e r i a l – t w o o r t h r e e s t r o k e s o f t h e file are usually sufficient for simple resharpening NGuide the file: horizontally ( a t a r i g h t angle to the side surface of the guide bar) in accordance with the specified angle – according to the markings on the file holder – rest the file holder on the tooth head and the depth gauge NFile only from the inside outward NThe file only sharpens on the forward stroke – lift the file on the backstroke NDo not file tie straps and drive links NRotate the file a little periodically in order to avoid uneven wear NTo remove file burr, use a piece of hardwood NCheck 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. NAll 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 Depth gauge setting The depth gauge determines the depth to which the cutter penetrates the wood and thus the chip thickness. 689BA025 KN 001BA203 KN 689BA018 KN 90° 689BA043 KN 689BA023 KN a
MS 171, MS 181, MS 181 C, MS 211, MS 211 C English 52 aRequired distance between depth gauge and cutting edge When cutting softwood outside of the frost season, the distance can be increased by up to 0.2 mm (0.008"). Lowering the depth gauges The depth gauge setting is lowered when the cutter is sharpened. NCheck the depth gauge setting after each sharpening NLay 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 reworkedSaw chains with humped drive link (2) – upper part of the humped drive link (2) (with service mark) is lowered at the same time as the depth gauge of the cutter. WARNING The rest of the humped drive link must not be filed; otherwise, this could increase the tendency of the chain saw to kick back. NR e w o r k t h e d e p t h g a u g e s o t h a t i t i s flush with the file gauge NAfterwards, 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 WARNING Depth gauges that are too low increase the kickback tendency of the chain saw. NLay the file gauge on the saw chain – the highest point of the depth gauge must be flush with the file gauge NAfter sharpening, clean the saw chain thoroughly, removing any filings or grinding dust – lubricate the saw chain thoroughly NIn the event of extended periods of disuse, store saw chains in cleaned and oiled condition Chain pitch Depth gauge Distance (a) Inches (mm) mm (Inches) 1/4 P (6.35) 0.45 (0.018) 1/4 (6.35) 0.65 (0.026) 3/8 P (9.32) 0.65 (0.026) 0.325 (8.25) 0.65 (0.026) 3/8 (9.32) 0.65 (0.026) 0.404 (10.26) 0.80 (0.031) 2 689BA061 KN 1 689BA051 KN 689BA044 KN 689BA052 KN
MS 171, MS 181, MS 181 C, MS 211, MS 211 C English 53 Sharpening tools (special accessories) Chain pitch Round file ^Round file File holder File gaugeTaper square file Sharpening set 1) Inches (mm) mm (Inches) Part number Part number Part number Part number Part number 1/4 P (6.35) 3.2 (1/8) 5605 771 32065605 750 4300 0000 893 4005 0814 252 3356 5605 007 1000 1/4 (6.35) 4.0 (5/32) 5605 772 40065605 750 4327 1110 893 4000 0814 252 3356 5605 007 1027 3/8 P (9.32) 4.0 (5/32) 5605 772 4006 5605 750 4327 1110 893 4000 0814 252 3356 5605 007 1027 0.325 (8.25) 4.8 (3/16) 5605 772 4806 5605 750 4328 1110 893 4000 0814 252 3356 5605 007 1028 3/8 (9.32) 5.2 (13/64) 5605 772 5206 5605 750 4329 1110 893 4000 0814 252 3356 5605 007 1029 0.404 (10.26) 5.5 (7/32) 5605 772 5506 5605 750 4330 1106 893 4000 0814 252 3356 5605 007 1030 1)consisting of file holder with round file, taper square file and file gauge
MS 171, MS 181, MS 181 C, MS 211, MS 211 C English 54 Maintenance and Care The following information applies under normal operating conditions. The specified intervals must be shortened accordingly when working for longer than normal each day or under difficult conditions (extensive dust, highly resinous lumber, lumber from tropical trees, etc.). If the machine is only used occasionally, the intervals can be extended accordingly. Before starting work At the end of work and/or daily Whenever tank is refilled Weekly Monthly Yearly If faulty If damaged As required Complete machineVisual inspection (condition, leaks)XX CleanX Throttle trigger, throttle trigger lockout, choke lever, choke control, stop switch, master control lever (dependent on equipment)Function testsXX Chain brakeFunction testsXX Have checked by a specialist dealer 1)X Manual fuel pump (if present)CheckX Have repaired by a specialist dealer 1)X Fuel pick-up body / filter in fuel tankCheckX Clean, replace filter insertXX ReplaceXXX Fuel tank CleanX Lubricating oil tank CleanX Chain lubrication CheckX Saw chainCheck, pay attention to sharpnessXX Check chain tensionXX SharpenX Guide barCheck (wear, damage)X Clean and turn overX DeburrX ReplaceXX Chain sprocket CheckX Air filterCleanXX ReplaceX
MS 171, MS 181, MS 181 C, MS 211, MS 211 C English 55 Anti-vibration elementsCheck XX Have them replaced by a servicing dealer1)X Air intake on fan housing CleanXX X Cylinder fins CleanXX CarburetorCheck idle adjustment – saw chain must not rotateXX Set the idle speed, have the chain saw repaired by a servicing dealer 1)X Spark plugAdjust electrode gapX Replace after 100 hours of operation All accessible screws, nuts and bolts (not adjusting screws)Tighten 2)X Spark arresting screen in mufflerHave checked by a specialist dealer 1)X Have cleaned by a specialist dealer, or replaced if necessary 1)X Chain catcherCheckX ReplaceX Exhaust boreDecarbonise after 139 hours of operation, subse- quently after every 150 hours of operationX Safety information label ReplaceX 1)STIHL recommends STIHL servicing dealers2)During initial use of professional chain saws (with a power output of 3.4 kW or more), tighten the cylinder block screws after 10 to 20 hours of operation The following information applies under normal operating conditions. The specified intervals must be shortened accordingly when working for longer than normal each day or under difficult conditions (extensive dust, highly resinous lumber, lumber from tropical trees, etc.). If the machine is only used occasionally, the intervals can be extended accordingly. Before starting work At the end of work and/or daily Whenever tank is refilled Weekly Monthly Yearly If faulty If damaged As required
MS 171, MS 181, MS 181 C, MS 211, MS 211 C English 561Shroud Twist Lock 2Carburetor Adjusting Screws 3Manual Fuel Pump (Easy Start 1)) 4Shutter (Summer and Winter Position, only MS 211) 5Chain Brake 6Chain Sprocket 7Chain Sprocket Cover 8Chain Catcher 9Chain Tensioner (lateral) 10Bumper Spike 11Guide Bar 12Oilomatic Saw Chain 13Adjusting Wheel for Quick Chain Tensioner 1) 14Handle of Wingnut (Quick Chain Tensioner1)) 15Oil Filler Cap 16Muffler 17Front Hand Guard 18Front Handle (Handlebar) 19Spark Plug Boot 20Starter Grip 21Fuel Filler Cap 22Master Control Lever 23Throttle Trigger 24Throttle Trigger Lockout 25Rear Handle 26Rear Hand Guard #Serial Number Main Parts 10 4 13 14 6 3 1 12 9 8 25 7 11 7 8 20 26 25 21 19 16 15 1718 22 23 24 # 533BA015 KN HSHQGLQJRQ0RGHO
MS 171, MS 181, MS 181 C, MS 211, MS 211 C English 57 Definitions 1 Shroud Twist Lock Lock for shroud. 2 Carburetor Adjusting Screws For tuning the carburetor. 3 Manual Fuel Pump Provides additional fuel feed for a cold start. 4Shutter With summer and winter positions. Carburetor is heated in winter position. 5Chain Brake A device to stop the rotation of the chain. Is activated in a kickback situation by the operator's hand or by inertia. 6 Chain Sprocket The toothed wheel that drives the saw chain. 7 Chain Sprocket Cover Covers the clutch and chain sprocket. 8 Chain Catcher Helps to reduce the risk of operator contact by a chain if it breaks or comes off the bar. 9 Chain Tensioner (lateral) Permits precise adjustment of chain tension. 10 Bumper Spike Toothed stop for holding saw steady against wood. 11 Guide Bar Supports and guides the saw chain.12 Oilomatic Saw Chain A loop consisting of cutters, tie straps and drive links. 13 Adjusting Wheel for Quick Chain Tensioner Permits precise adjustment of chain tension. 14 Handle of Wingnut (Quick Chain Tensioner) Must be released to allow chain to be tensioned with adjusting wheel. 15 Oil Filler Cap For closing the oil tank. 16 Muffler Reduces engine exhaust noise and diverts exhaust gases away from operator. 17 Front Hand Guard Provides protection against projecting branches and helps prevent left hand from touching the chain if it slips off the handlebar. It also serves as the lever for chain brake activation. 18 Front Handle (Handlebar) Handlebar for the left hand at the front of the saw. 19 Spark Plug Boot Connects the spark plug with the ignition lead. 20 Starter Grip The grip of the pull starter, for starting the engine. 21 Fuel Filler Cap For closing the fuel tank.22 Master Control Lever Lever for choke control, starting throttle, run and stop switch position. 23 Throttle Trigger Controls the speed of the engine. 24 Throttle Trigger Lockout Must be depressed before the throttle trigger can be activated. 25 Rear Handle The support handle for the right hand, located at the rear of the saw. 26 Rear Hand Guard Gives added protection to operator's right hand. Guide Bar Nose The exposed end of the guide bar. (not illustrated, see chapter "Tensioning the Saw Chain") Clutch Couples engine to chain sprocket when engine is accelerated beyond idle speed. (not illustrated) Anti-Vibration System The anti-vibration system includes a number of anti-vibration elements designed to reduce the transmission of vibrations created by the engine and cutting attachment to the operator's hands. (not illustrated)
MS 171, MS 181, MS 181 C, MS 211, MS 211 C English 58 EPA / CEPA The Emission Compliance Period referred to on the Emissions Compliance Label indicates the number of operating hours for which the engine has been shown to meet Federal emission requirements. Category CARB The Emission Compliance Period used on the CARB-Air Index Label indicates the terms: Engine STIHL single cylinder two-stroke engine MS 171MS 181, MS 181 C MS 211, MS 211 C Ignition system Electronic magneto ignition (breakerless) Fuel system All position diaphragm carburetor with integral fuel pump Chain lubrication Fully automatic, speed-controlled oil pump with rotary piston Weight Cutting Attachments Recommended cutting attachments conforming with the 45 degree computed kickback angle requirement of Section 5.11 of ANSI/OPEI B175.1-2012 when used on this model chain saw (see the chapter on "Safety Precautions and Working Techniques"): Specifications A = 300 hours B = 125 hours C = 50 hours Extended = 300 hours Intermediate = 125 hours Moderate = 50 hours Displacement: 1.94 cu. in. (31.8 cm 3) Bore: 1.6 in. (38 mm) Stroke: 1.1 in. (28 mm)Engine power to ISO 7293:1.7 hp (1.3 kW) at 10,000 rpm Idle speed: 2,800 rpm Maximum permissi- ble speed with bar and chain: 13,500 rpm Displacement: 1.94 cu. in. (31.8 cm 3) Bore: 1.6 in. (38 mm) Stroke: 1.1 in. (28 mm) Engine power to ISO 7293:2.0 hp (1.5 kW) at 10,000 rpm Idle speed: 2,800 rpm Maximum permissi- ble speed with bar and chain: 13,500 rpm Displacement: 2.15 cu. in. (35.2 cm 3) Bore: 1.7 in. (40 mm) Stroke: 1.1 in. (28 mm) Engine power to ISO 7293:2.3 hp (1.7 kW) at 10,000 rpm Idle speed: 2,800 rpm Maximum permissi- ble speed with bar and chain: 13,500 rpmSpark plug (suppressed): NGK CMR6H Bosch USR4AC Electrode gap: 0.02 in. (0.5 mm) Fuel tank capacity: 9.1 fl.oz (0.27 l) Oil tank capacity:9.0 fl.oz (0.265 l) dry, without bar and chain MS 171: 9.5 lbs. (4.3 kg) MS 181: 9.5 lbs. (4.3 kg) MS 181 C: 10.1 lbs. (4.6 kg) MS 211: 9.5 lbs. (4.3 kg) MS 211 C: 10.1 lbs. (4.6 kg)