Product Instruction Manual
Page 2
... Machine 46 Checking and Replacing Chain Sprocket 47 Maintaining and Sharpening Saw Chain 48 Maintenance Chart 52 Parts and Controls 54 Specifications 56 Special Accessories 58 Ordering Spare Parts 58 Maintenance and Repairs 58 STIHl MS 290, MS 310, MS 390 STIHL Incorporated Federal Emission Control Warranty Statement 59 Trademarks 61 Allow only persons who understand this Manual...
... Machine 46 Checking and Replacing Chain Sprocket 47 Maintaining and Sharpening Saw Chain 48 Maintenance Chart 52 Parts and Controls 54 Specifications 56 Special Accessories 58 Ordering Spare Parts 58 Maintenance and Repairs 58 STIHl MS 290, MS 310, MS 390 STIHL Incorporated Federal Emission Control Warranty Statement 59 Trademarks 61 Allow only persons who understand this Manual...
Product Instruction Manual
Page 4
...children, and animals should never be allowed in the area where it understands the information contained in this machine when you have different parts and controls. during a work , check with any other purposes, since such misuse may be dangerous. Safe use it is in... description of the controls and the function of the parts of this machine may result in use this machine. MS 290, MS 310, MS 390 3 Read the instruction manual and the safety instructions periodically. The use (e.g. When it . Observe all STIHL chainsaws. Have your model. If the cutters contact...
...children, and animals should never be allowed in the area where it understands the information contained in this machine when you have different parts and controls. during a work , check with any other purposes, since such misuse may be dangerous. Safe use it is in... description of the controls and the function of the parts of this machine may result in use this machine. MS 290, MS 310, MS 390 3 Read the instruction manual and the safety instructions periodically. The use (e.g. When it . Observe all STIHL chainsaws. Have your model. If the cutters contact...
Product Instruction Manual
Page 5
...parts of the unit. In order to vibrations may produce whitefinger disease (Raynaud's phenomenon) or carpal tunnel syndrome. Keep the saw chain sharp. Maintain a firm grip at all times, but allow complete freedom of exposure to your hands. - The ignition system of the STIHL... boots with a pacemaker should closely monitor the condition of serious or fatal injury, persons with nonslip soles. Most STIHL power tools are recommended. 4 MS 290, MS 310, MS 390 Keep the AV system well maintained. This field may cause nerve and circulation damage and tissue necrosis. Clothing ...
...parts of the unit. In order to vibrations may produce whitefinger disease (Raynaud's phenomenon) or carpal tunnel syndrome. Keep the saw chain sharp. Maintain a firm grip at all times, but allow complete freedom of exposure to your hands. - The ignition system of the STIHL... boots with a pacemaker should closely monitor the condition of serious or fatal injury, persons with nonslip soles. Most STIHL power tools are recommended. 4 MS 290, MS 310, MS 390 Keep the AV system well maintained. This field may cause nerve and circulation damage and tissue necrosis. Clothing ...
Product Instruction Manual
Page 6
...TOOL For illustrations and definitions of injury to reduce the risk of the power tool parts see the chapter on "Main Parts and Controls." !Warning! Although certain unauthorized attachments are useable with STIHL power tools, their hearing checked regularly. Do not continue operating this machine if ... your face STIHL recommends that the machine is subjected to your hearing. Grip the front handle in any way. Always engage the chain brake when taking more than a few steps. !Warning! If this power tool in a manner that you . 001BA115 KN MS 290, MS 310, MS 390 5 ...
...TOOL For illustrations and definitions of injury to reduce the risk of the power tool parts see the chapter on "Main Parts and Controls." !Warning! Although certain unauthorized attachments are useable with STIHL power tools, their hearing checked regularly. Do not continue operating this machine if ... your face STIHL recommends that the machine is subjected to your hearing. Grip the front handle in any way. Always engage the chain brake when taking more than a few steps. !Warning! If this power tool in a manner that you . 001BA115 KN MS 290, MS 310, MS 390 5 ...
Product Instruction Manual
Page 10
... unit firmly with one -handed operation is increased danger of your hand or any other part of slipping on freshly debarked logs. With your unit with the running cutting tool, do...with incorrect idle adjustment. Watch for you cannot set the correct idle speed, have your STIHL dealer check your fingers and thumbs around the handles. To reduce the risk of personal injury... the limb or log. For directions on reactive forces). !Warning! It is heavy. 001BA087 LÄ MS 290, MS 310, MS 390 9 Special care must be taken in slippery conditions (wet ground, snow) and in wet and ...
... unit firmly with one -handed operation is increased danger of your hand or any other part of slipping on freshly debarked logs. With your unit with the running cutting tool, do...with incorrect idle adjustment. Watch for you cannot set the correct idle speed, have your STIHL dealer check your fingers and thumbs around the handles. To reduce the risk of personal injury... the limb or log. For directions on reactive forces). !Warning! It is heavy. 001BA087 LÄ MS 290, MS 310, MS 390 9 Special care must be taken in slippery conditions (wet ground, snow) and in wet and ...
Product Instruction Manual
Page 13
...other parts while they may be replaced, consult your STIHL servicing dealer. !Warning! Let the engine cool down as rapidly as to whether the buffers should always be observed. !Warning! Never modify your muffler serviced and repaired by a STIHL servicing dealer. 12 MS 290, MS 310, MS 390 ... worn buffers immediately, since they are equipped with a catalytic converter cools down less rapidly than conventional mufflers, always set your STIHL servicing dealer only. The muffler and other combustible materials while it where the muffler is still hot. !Warning! An improperly...
...other parts while they may be replaced, consult your STIHL servicing dealer. !Warning! Let the engine cool down as rapidly as to whether the buffers should always be observed. !Warning! Never modify your muffler serviced and repaired by a STIHL servicing dealer. 12 MS 290, MS 310, MS 390 ... worn buffers immediately, since they are equipped with a catalytic converter cools down less rapidly than conventional mufflers, always set your STIHL servicing dealer only. The muffler and other combustible materials while it where the muffler is still hot. !Warning! An improperly...
Product Instruction Manual
Page 16
...forces are designed to reduce the risk of the hand guard on newer STIHL chainsaws can cause excessive heat, leading to ensure that the operator's left ...is engaged or when the chain is accelerated towards the bar nose even without a front hand guard. MS 290, MS 310, MS 390 15 If the cutting position is such that the Quickstop has sufficient time to reduce the risk... Quickstop chain brake. See the chapter entitled "Chain Brake" of the chain brake. No Quickstop or other parts of kickback injury, it must be enough distance between the bar and the operator to severe damage of the...
...forces are designed to reduce the risk of the hand guard on newer STIHL chainsaws can cause excessive heat, leading to ensure that the operator's left ...is engaged or when the chain is accelerated towards the bar nose even without a front hand guard. MS 290, MS 310, MS 390 15 If the cutting position is such that the Quickstop has sufficient time to reduce the risk... Quickstop chain brake. See the chapter entitled "Chain Brake" of the chain brake. No Quickstop or other parts of kickback injury, it must be enough distance between the bar and the operator to severe damage of the...
Product Instruction Manual
Page 23
... these techniques. If the saw begins to pinch, insert a wedge to the tree at full throttle, insert the guide bar in the trunk. 22 MS 290, MS 310, MS 390 Cut until the depth of the guide bar. Then, using the bumper spike as the width of the kerf is made with the guide... bar requires use of the nose of the plunge-cut method before making the felling cut. Sectioning method For the sectioning method make the first part of the notch. 001BA148 KN Felling cut for large diameter trees: !Warning! Avoid repositioning the saw in the direction in which the recess is to...
... these techniques. If the saw begins to pinch, insert a wedge to the tree at full throttle, insert the guide bar in the trunk. 22 MS 290, MS 310, MS 390 Cut until the depth of the guide bar. Then, using the bumper spike as the width of the kerf is made with the guide... bar requires use of the nose of the plunge-cut method before making the felling cut. Sectioning method For the sectioning method make the first part of the notch. 001BA148 KN Felling cut for large diameter trees: !Warning! Avoid repositioning the saw in the direction in which the recess is to...
Product Instruction Manual
Page 24
... extremely cautious and avoid contacting the log or other reason does not fall completely, set the saw by leaving the lower limbs to fall, since part of the bar. Do not stand on the preplanned escape path. When underbucking freely hanging limbs, a pinch may result or the limb may be ... as shown in the illustration. !Warning! Always keep to cut it you are poorly supported. If you try to the side of a professional. !Warning! MS 290, MS 310, MS 390 23 Seek the help of the falling tree. Be extremely careful with the nose of the trunk may split and come back towards the...
... extremely cautious and avoid contacting the log or other reason does not fall completely, set the saw by leaving the lower limbs to fall, since part of the bar. Do not stand on the preplanned escape path. When underbucking freely hanging limbs, a pinch may result or the limb may be ... as shown in the illustration. !Warning! Always keep to cut it you are poorly supported. If you try to the side of a professional. !Warning! MS 290, MS 310, MS 390 23 Seek the help of the falling tree. Be extremely careful with the nose of the trunk may split and come back towards the...
Product Instruction Manual
Page 26
... has not been serviced or maintained properly or if nonapproved replacement parts were used to hold the flywheel in hot or dry weather. Use only identical STIHL replacement parts for the chain brake on your STIHL chainsaw to cut wood becomes hard to properly perform its function of... your instruction manual. MS 290, MS 310, MS 390 25 Have such work not described in good condition. Keep the chain sharp. Excessive wear will increase the risk of fire and hearing loss. Remember that could subsequently cause the flywheel to reduce the risk of non-STIHL parts may cause a fire...
... has not been serviced or maintained properly or if nonapproved replacement parts were used to hold the flywheel in hot or dry weather. Use only identical STIHL replacement parts for the chain brake on your STIHL chainsaw to cut wood becomes hard to properly perform its function of... your instruction manual. MS 290, MS 310, MS 390 25 Have such work not described in good condition. Keep the chain sharp. Excessive wear will increase the risk of fire and hearing loss. Remember that could subsequently cause the flywheel to reduce the risk of non-STIHL parts may cause a fire...
Product Instruction Manual
Page 38
Always disengage chain brake before starting work. 143BA012 KN At very low outside temperatures: : Allow engine to warm up at part throttle. : Change over to winter operation if necessary - High revs with the chain brake engaged (chain locked) will quickly damage the powerhead and chain drive (... - see "Winter Operation". 139BA016 KN To shut down the engine: : Move Master Control lever to the rear. : Pull the prefilter (1) upward and out. 139BA001 KN MS 290, MS 310, MS 390 37 your saw is ready for operation. slot vertical. : lift off the carburetor box cover to 0.
Always disengage chain brake before starting work. 143BA012 KN At very low outside temperatures: : Allow engine to warm up at part throttle. : Change over to winter operation if necessary - High revs with the chain brake engaged (chain locked) will quickly damage the powerhead and chain drive (... - see "Winter Operation". 139BA016 KN To shut down the engine: : Move Master Control lever to the rear. : Pull the prefilter (1) upward and out. 139BA001 KN MS 290, MS 310, MS 390 37 your saw is ready for operation. slot vertical. : lift off the carburetor box cover to 0.
Product Instruction Manual
Page 39
.... see "Tensioning the Saw Chain"! The drive links must not come out of the bar and can damage the crankshaft and bearings. 38 MS 290, MS 310, MS 390 The chain contracts as it is correct when chain fits snugly against the underside of the bar groove - see "Adjusting Carburetor". Retension ... stretches and begins to be retensioned more often than one that has been in use for the first three tank fillings. reassemble all moving parts have to bed in during the break-in period, the frictional resistances in the engine are greater during the break-in period. Chain cold...
.... see "Tensioning the Saw Chain"! The drive links must not come out of the bar and can damage the crankshaft and bearings. 38 MS 290, MS 310, MS 390 The chain contracts as it is correct when chain fits snugly against the underside of the bar groove - see "Adjusting Carburetor". Retension ... stretches and begins to be retensioned more often than one that has been in use for the first three tank fillings. reassemble all moving parts have to bed in during the break-in period, the frictional resistances in the engine are greater during the break-in period. Chain cold...
Product Instruction Manual
Page 42
...filters. With this carburetor it out with compressed air from the factory with STIHL universal cleaner or in a clean, non-flammable cleaning solution (e.g. Never use a brush to adjust the engine idle speed within fine limits! MS 290, MS 310, MS 390 41 carburation, ignition, timing and valve or port timing) without the... of the filter. This setting provides an optimum fuel-air mixture under most operating conditions. warm soapy water) and dry all parts of the fundamental engine parameters and components (e.g. General information The carburetor comes from the inside outward.
...filters. With this carburetor it out with compressed air from the factory with STIHL universal cleaner or in a clean, non-flammable cleaning solution (e.g. Never use a brush to adjust the engine idle speed within fine limits! MS 290, MS 310, MS 390 41 carburation, ignition, timing and valve or port timing) without the... of the filter. This setting provides an optimum fuel-air mixture under most operating conditions. warm soapy water) and dry all parts of the fundamental engine parameters and components (e.g. General information The carburetor comes from the inside outward.
Product Instruction Manual
Page 44
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 engine damage. 1 1 1 3 2 139BA020 KN English / USA Checking the Spark Plug 000BA002 KN 139 BA021 KN If the engine is ... in Muffler* Adjustment for operation at high altitude A slight correction of the setting may result in trouble in operation. * see "Guide to Using this Manual" MS 290, MS 310, MS 390 43 fit the cover. risk 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 engine damage. 1 1 1 3 2 139BA020 KN English / USA Checking the Spark Plug 000BA002 KN 139 BA021 KN If the engine is ... in Muffler* Adjustment for operation at high altitude A slight correction of the setting may result in trouble in operation. * see "Guide to Using this Manual" MS 290, MS 310, MS 390 43 fit the cover. risk of the spark plug.
Product Instruction Manual
Page 45
...rotor with washer (3) and pawl (4). see "Specifications". : Use only resistor type spark plugs of fire and burn injury, use only spark plugs authorized by STIHL. Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded. see "Starting / Stopping the Engine". : Clean... may create arcing that could ignite combustible fumes and cause a fire. 23 4 : Use screwdriver or suitable pliers to start or runs poorly at part load. Always press spark plug boot (2) snugly onto spark plug terminal (1) of spark plug: : Too much oil in the boot may pop out...
...rotor with washer (3) and pawl (4). see "Specifications". : Use only resistor type spark plugs of fire and burn injury, use only spark plugs authorized by STIHL. Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded. see "Starting / Stopping the Engine". : Clean... may create arcing that could ignite combustible fumes and cause a fire. 23 4 : Use screwdriver or suitable pliers to start or runs poorly at part load. Always press spark plug boot (2) snugly onto spark plug terminal (1) of spark plug: : Too much oil in the boot may pop out...
Product Instruction Manual
Page 47
... carburetor is dry, this process. the anchor loop must engage the lug. : Apply suitable tools (screwdriver, punch, etc.) to carefully pry the parts of the spring out of the housing. 001BA103 KN : Lubricate the new spring with a few drops of spring in position. Replacing a broken rewind... use a biological chain and bar lubricant, e.g. STIHL BioPlus, completely fill the chain oil tank. : Store the unit in the fan housing - English / USA Storing the Machine : Take one turn of children and other unauthorized persons. 46 MS 290, MS 310, MS 390 The bits of non-resinous oil. :...
... carburetor is dry, this process. the anchor loop must engage the lug. : Apply suitable tools (screwdriver, punch, etc.) to carefully pry the parts of the spring out of the housing. 001BA103 KN : Lubricate the new spring with a few drops of spring in position. Replacing a broken rewind... use a biological chain and bar lubricant, e.g. STIHL BioPlus, completely fill the chain oil tank. : Store the unit in the fan housing - English / USA Storing the Machine : Take one turn of children and other unauthorized persons. 46 MS 290, MS 310, MS 390 The bits of non-resinous oil. :...
Product Instruction Manual
Page 49
... angles A and B are obtained automatically if the recommended files or sharpening tools and correct settings are used. 48 MS 290, MS 310, MS 390 It is marked on the depth gauge end of the original parts. see table "Sharpening Tools". You must observe certain angles when resharpening the chain cutter. and in the links and...
... angles A and B are obtained automatically if the recommended files or sharpening tools and correct settings are used. 48 MS 290, MS 310, MS 390 It is marked on the depth gauge end of the original parts. see table "Sharpening Tools". You must observe certain angles when resharpening the chain cutter. and in the links and...
Product Instruction Manual
Page 52
...of file holder with the filing gauge. The kickback tendency of depth gauge must not be level with round file, flat file and filing gauge MS 290, MS 310, MS 390 51 highest point of the chainsaw is lowered along with the depth gauge. PM 1, RM2: Rear hump of the humped drive link (... this may increase the kickback tendency of the depth gauge parallel to the stamped service marking (see arrow) - RSC3, RMC3, PMC3, PMMC3: The upper part of tie strap (with service marking) is lowered along with service marking) is increased if the depth gauges are too low. 689BA044 KN 689BA052 KN...
...of file holder with the filing gauge. The kickback tendency of depth gauge must not be level with round file, flat file and filing gauge MS 290, MS 310, MS 390 51 highest point of the chainsaw is lowered along with the depth gauge. PM 1, RM2: Rear hump of the humped drive link (... this may increase the kickback tendency of the depth gauge parallel to the stamped service marking (see arrow) - RSC3, RMC3, PMC3, PMMC3: The upper part of tie strap (with service marking) is lowered along with service marking) is increased if the depth gauges are too low. 689BA044 KN 689BA052 KN...
Product Instruction Manual
Page 55
English / USA Parts and Controls 54 1 Carburetor box cover twist lock 2 Carburetor adjusting screws 3 Spark plug boot 4 Chain sprocket cover 5 Chain sprocket 6 Chain brake 7 Chain tensioner 8 Chain catcher 9 Bumper spike 10 Guide bar 11 Oilomatic saw chain # Serial number 12 Oil filler cap 13 Muffler 14 Front hand guard 15 Front handle (handlebar) 16 Decompression valve* 17 Starter grip 18 Master Control lever 19 Fuel filler cap 20 Throttle trigger 21 Throttle trigger interlock 22 Rear handle 23 Rear hand guard * see "Guide to Using this Manual" MS 290, MS 310, MS 390
English / USA Parts and Controls 54 1 Carburetor box cover twist lock 2 Carburetor adjusting screws 3 Spark plug boot 4 Chain sprocket cover 5 Chain sprocket 6 Chain brake 7 Chain tensioner 8 Chain catcher 9 Bumper spike 10 Guide bar 11 Oilomatic saw chain # Serial number 12 Oil filler cap 13 Muffler 14 Front hand guard 15 Front handle (handlebar) 16 Decompression valve* 17 Starter grip 18 Master Control lever 19 Fuel filler cap 20 Throttle trigger 21 Throttle trigger interlock 22 Rear handle 23 Rear hand guard * see "Guide to Using this Manual" MS 290, MS 310, MS 390
Product Instruction Manual
Page 59
... chain in this Owner's Manual. 58 MS 290, MS 310, MS 390 Original STlHL parts can be available for information regarding special accessories that may be accepted only if the repair has been performed by an authorized STIHL servicing dealer using original STIHL replacement parts. Guide bar part number Chain part number For recommended STIHL reduced kickback cutting attachments see section...
... chain in this Owner's Manual. 58 MS 290, MS 310, MS 390 Original STlHL parts can be available for information regarding special accessories that may be accepted only if the repair has been performed by an authorized STIHL servicing dealer using original STIHL replacement parts. Guide bar part number Chain part number For recommended STIHL reduced kickback cutting attachments see section...