Stihl MS 381 Instruction Manual Download Page 47

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English

MS 381

Carburetor box cover twist lock

Carburetor adjusting screws

Spark plug boot

Decompression valve*

Chain brake

Chain sprocket

Chain sprocket cover

Chain tensioner

Chain catcher

Spiked bumper

Guide bar

Oilomatic saw chain

Serial number

Oil tank filler cap

Muffler with spark arresting
screens*

Front hand guard

Front handle (handlebar)

Starter grip

Fuel tank filler cap

Master Control lever

Throttle trigger

Throttle trigger interlock

Rear handle

Rear hand guard

see "Guide to Using this Manual"

Main Parts and Controls

538BA001 KN

538BA002 KN

Summary of Contents for MS 381

Page 1: ...Instruction Manual STIH STIHL MS 381 BA_MS381_01_U_M6 book Seite 0 Montag 6 November 2006 10 15 10...

Page 2: ...djusting the Carburetor 31 Checking the Spark Plug 32 Spark Arresting Screen in Muffler 33 Replacing Starter Rope and Rewind Spring 34 Storing the Machine 36 Checking and Replacing Chain Sprocket 36 M...

Page 3: ...e is a risk of damaging the machine or its individual components Note or hint which is not essential for using the machine but may improve the operator s under standing of the situation and result in...

Page 4: ...power tool Persons with pacemakers only The ignition system of your unit produces an electromagnetic field of a very low intensity This field may interfere with some pacemakers To reduce the risk of...

Page 5: ...gage the chain brake and fit the chain guard scabbard before carrying the saw short distances Also stop the engine before carrying the saw longer distances more than about 50 m Always carry the saw by...

Page 6: ...tomatically to idle position Master control stop switch must move easily to STOP or 0 Check that spark plug boot is secure a loose boot may cause arcing that could ignite combustible fumes and cause a...

Page 7: ...tilated locations even if your model is equipped with a catalytic converter To reduce the risk of serious or fatal injury from breathing toxic fumes ensure proper ventilation when working in trenches...

Page 8: ...a description of this device refer to chapter on Chain brake in this manual To reduce the risk of kickback Work cautiously and avoid situations which could cause kickback Hold the chainsaw firmly wit...

Page 9: ...pinched Do not twist the guide bar in the cut Exercise extreme caution with leaners with trees that have fallen unfavorably between other trees and are under strain when working in blowdown areas Do n...

Page 10: ...that your body is clear of the cutting attachment Always pull the saw out of the cut with the chain running Use your chainsaw for cutting only It is not designed for prying or shoveling away limbs roo...

Page 11: ...in the necessary techniques Observe all country specific regulations on felling techniques Check that there are no other persons in the felling area other than helpers Make sure no one is endangered b...

Page 12: ...ree First clear the tree base and work area from interfering limbs and brush to provide a secure footing Clean lower portion of tree base with an axe Sand stones and other foreign objects will dull th...

Page 13: ...apwood cuts in long fibered softwood help prevent sapwood splintering when the tree falls Make cuts at both sides of the trunk at same height as bottom of felling notch to a depth of about 1 10 of tru...

Page 14: ...ly before the tree falls Small diameter trees simple fan cut Apply the spiked bumper behind the hinge pivot the saw around this point only as far as the hinge The spiked bumper rolls against the trunk...

Page 15: ...t until depth of kerf is twice the width of the guide bar Swing saw slowly 2 into plunge cutting position Take care because of the risk of kickback or pushback Make the plunge cut 3 very carefully Dan...

Page 16: ...om the bottom upwards underbuck be wary of pushback Do not cut a lying log at a point where it is touching the ground because the saw chain will otherwise be damaged Vibrations Prolonged use of the un...

Page 17: ...n see Specifications Inspect ignition lead insulation in good condition secure connection Do not turn the engine over on the starter with the spark plug boot or spark plug removed unless the slide con...

Page 18: ...eters e g 1 6 If non matching components of the wrong pitch or drive link gauge are run together on the same machine they may be damaged beyond repair after a short period of operation Unscrew the nut...

Page 19: ...ing screw 1 clockwise until chain fits snugly against the underside of the bar While still holding the bar nose up tighten down the nuts firmly Go to chapter Checking Chain Tension A new chain has to...

Page 20: ...uls of leaded gasoline will greatly reduce the efficiency of the catalytic converter Engine Oil Use only quality two stroke engine oil We recommend STIHL two stroke engine oil since it is specially fo...

Page 21: ...r open it carefully Clean the fuel tank and canister from time to time Dispose of remaining fuel and cleaning fluid properly in accordance with local regulations and environment requirements Before fu...

Page 22: ...the new pickup body into the hose Place the pickup body in the tank For automatic and reliable lubrication of the chain and guide bar use only an environmentally compatible quality chain and bar lubr...

Page 23: ...nt of oil in the oil tank when the fuel tank is empty If the oil level in the tank does not go down the reason may be a problem in the oil supply system Check chain lubrication clean the oilways conta...

Page 24: ...rake engaged chain locked will quickly damage the powerhead and chain drive clutch chain brake The chain brake is also activated by the inertia of the front hand guard if the kickback force of the saw...

Page 25: ...queeze throttle trigger at the same time 3 Warm start 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...

Page 26: ...lace your saw on the ground Make sure you have a firm footing check that the chain is not touching any object or the ground Bystanders must be well clear of the general work area of the saw Hold the s...

Page 27: ...and continue cranking As soon as the engine runs immediately blip the throttle trigger 8 the Master Control lever 7 will move to the run position 9 and the engine will settle down to idling speed As...

Page 28: ...re the combustion chamber has flooded Move Master Control 7 to run position Loosen knob 10 in direction of arrow Remove carburetor box cover 11 Pull off the spark plug boot Unscrew and dry off the spa...

Page 29: ...still be pulled along the bar by hand Retension if necessary see Tensioning the Saw Chain Chain at operating temperature The chain stretches and begins to sag The drive links must not come out of the...

Page 30: ...ou 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...

Page 31: ...and remove the prefilter 7 Knock the filter out on the palm of your hand or blow it clear with compressed air from the inside outwards Do not use a brush to clean the fleece filter In case of stubborn...

Page 32: ...r Shut off the engine Check the air filter and clean or replace it if necessary Carefully screw both adjusting screws down onto their seats clockwise Open high speed screw H one full turn Open the low...

Page 33: ...atic idling behavior poor acceleration even though the low speed screw is opened one turn Idle setting is too lean Turn the low speed screw L counterclockwise until engine runs and accelerates smoothl...

Page 34: ...ed by STIHL see Specifications To reduce the risk of arcing and fire If the spark plug comes with a detachable adapter nut 1 screw it on firmly On all spark plugs Always press the boot 2 firmly on to...

Page 35: ...from the starter post Carefully remove the rope rotor with washer 3 and pawl 4 The rewind spring may pop out during this procedure take care to avoid injury Use a screwdriver to pry the rope 5 out of...

Page 36: ...tor Let go of rope slowly so that it winds onto the rotor The starter grip must locate firmly in the rope guide bushing If the grip droops to one side Increase spring tension by adding one more turn W...

Page 37: ...nit 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 unit in a dry and high or l...

Page 38: ...driver to remove the E clip 1 Take off the washer 2 Use circlip pliers Special Accessories to remove the circlip 4 Take out the screws 5 Remove the side plate 6 and cover 7 with cover washer 8 Remove...

Page 39: ...age the oil pump drive worm by rotating it counterclockwise while pushing it onto the pump shaft Lubricate the worm and spur gear with STlHL grease Special Accessories Fit the cover cover washer and s...

Page 40: ...ectly sharpened and in particular if the depth gauge is set too low there is a risk of increased kickback of the chainsaw with resulting risk of injury The chain pitch e g 3 8 is marked on the depth g...

Page 41: ...depth gauge setting and cutter length It also cleans the guide bar groove and oil inlet holes File correctly Select sharpening tools according to chain pitch Clamp the bar in a vise if necessary Lock...

Page 42: ...an electric grinder Depth gauge setting The depth gauge determines the height at which the cutter enters the wood and thus the thickness of the chip removed Specified distance or setting between dept...

Page 43: ...ricate the chain thoroughly Before long out of service period clean the chain and store it in a well oiled condition 689BA044 KN 689BA052 KN Sharpening Tools special accessories Chain pitch Round file...

Page 44: ...kly monthly every 12 months if problem if damaged as required Complete machine Visual inspection condition leaks X X Clean X Throttle trigger trigger interlock Master Control Check operation X X Chain...

Page 45: ...a resin rich wood tropical wood etc shorten the specified intervals accordingly If you only use the saw occasionally extend the intervals accordingly before starting work after finishing work or daily...

Page 46: ...STIHL recommends that you have maintenance and repair work carried out only by an authorized STIHL servicing dealer STIHL servicing dealers are able to attend regular training courses and receive tec...

Page 47: ...bar 12 Oilomatic saw chain Serial number 13 Oil tank filler cap 14 Muffler with spark arresting screens 15 Front hand guard 16 Front handle handlebar 17 Starter grip 18 Fuel tank filler cap 19 Master...

Page 48: ...sprockets 7 and 8 tooth rim sprockets 7 tooth spur sprocket Chain lubrication Fully automatic speed controlled rotary piston oil pump Additional manual oil flow control File holder with round file Fi...

Page 49: ...ed out by a servicing dealer STIHL recommends that all maintenance and repair work be carried out by an authorized STIHL dealer STIHL dealers regularly attend training courses and are supplied with th...

Page 50: ...ing The CE type examination was carried out by Deutsche Pr fstelle f r Land und Forsttechnik DPLF Postfach 41 03 56 34114 Kassel Certification number K EG 2003 3756 See CE label for machine s year of...

Page 51: ...50 English MS 381...

Page 52: ...51 MS 381 English...

Page 53: ...52 English MS 381...

Page 54: ...0458 538 0121 A englisch English BA_MS381_01_U_M6 book Seite 1 Montag 6 November 2006 10 15 10...

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