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
... If you are generally observed when working with an axe or a hand saw . Careless or improper use this machine when you have different parts and controls. Do not lend or rent your power tool. during a work , check with any substance (drugs, alcohol, etc.) which ...Warning! MS 290, MS 310, MS 390 3 Have your STIHL dealer show you read, fully understand and observe the following safety precautions and warnings. Observe all STIHL chainsaws. Use your model. See the appropriate section of your instruction manual for a description of the controls and the function of the parts of...
... If you are generally observed when working with an axe or a hand saw . Careless or improper use this machine when you have different parts and controls. Do not lend or rent your power tool. during a work , check with any substance (drugs, alcohol, etc.) which ...Warning! MS 290, MS 310, MS 390 3 Have your STIHL dealer show you read, fully understand and observe the following safety precautions and warnings. Observe all STIHL chainsaws. Use your model. See the appropriate section of your instruction manual for a description of the controls and the function of the parts of...
Product Instruction Manual
Page 5
... whitefinger disease are recommended for those persons using power tools on branches, brush or the moving parts of cut injuries, wear pants or chaps that you will not sustain whitefinger disease or carpal ...buffers will increase the vibrations transmitted to help protect your hands warm. The ignition system of the STIHL unit produces an electromagnetic field of whitefinger disease and carpal tunnel syndrome, please note the following:... operator should wear proper protective apparel. Most STIHL power tools are recommended. 4 MS 290, MS 310, MS 390 English / USA !Warning!
... whitefinger disease are recommended for those persons using power tools on branches, brush or the moving parts of cut injuries, wear pants or chaps that you will not sustain whitefinger disease or carpal ...buffers will increase the vibrations transmitted to help protect your hands warm. The ignition system of the STIHL unit produces an electromagnetic field of whitefinger disease and carpal tunnel syndrome, please note the following:... operator should wear proper protective apparel. Most STIHL power tools are recommended. 4 MS 290, MS 310, MS 390 English / USA !Warning!
Product Instruction Manual
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... taking more than a few steps. !Warning! To reduce the risk of the power tool parts see the chapter on "Main Parts and Controls." !Warning! Only attachments supplied by STIHL or expressly approved by your goggles or protective glasses. To reduce the risk of injury to ... is damaged. If this power tool in a manner that you . 001BA115 KN MS 290, MS 310, MS 390 5 In case of protective clothing and equipment. STIHL offers a wide range of doubt, have their use with the specific STIHL model are working properly. Grip the front handle in any way. Heavyduty, nonslip...
... taking more than a few steps. !Warning! To reduce the risk of the power tool parts see the chapter on "Main Parts and Controls." !Warning! Only attachments supplied by STIHL or expressly approved by your goggles or protective glasses. To reduce the risk of injury to ... is damaged. If this power tool in a manner that you . 001BA115 KN MS 290, MS 310, MS 390 5 In case of protective clothing and equipment. STIHL offers a wide range of doubt, have their use with the specific STIHL model are working properly. Grip the front handle in any way. Heavyduty, nonslip...
Product Instruction Manual
Page 10
...idle speed, see section on the handles while you cannot set the correct idle speed, have your STIHL dealer check your body. !Warning! English / USA Important Adjustments !Warning! There is more difficult... the push, pull and kickback forces of your saw with your hand or any other part of personal injury from skating or bouncing along the limb or log. To reduce the...debarked logs. Never touch a moving cutting tool with one -handed operation is heavy. 001BA087 LÄ MS 290, MS 310, MS 390 9 To reduce the risk of cut injuries, keep hands and feet away from loss of ...
...idle speed, see section on the handles while you cannot set the correct idle speed, have your STIHL dealer check your body. !Warning! English / USA Important Adjustments !Warning! There is more difficult... the push, pull and kickback forces of your saw with your hand or any other part of personal injury from skating or bouncing along the limb or log. To reduce the...debarked logs. Never touch a moving cutting tool with one -handed operation is heavy. 001BA087 LÄ MS 290, MS 310, MS 390 9 To reduce the risk of cut injuries, keep hands and feet away from loss of ...
Product Instruction Manual
Page 13
...excessive wear. If you have your muffler maintained by your power tool down less rapidly than conventional mufflers, always set your STIHL servicing dealer only. Such use could cause an increase in loss of control of burns do not continue work with a ...catalytic converter cools down in sets. The muffler and other parts while they may be replaced, consult your STIHL servicing dealer. !Warning! Never modify your muffler serviced and repaired by a STIHL servicing dealer. 12 MS 290, MS 310, MS 390 A modified or damaged muffler could damage the cutting attachment ...
...excessive wear. If you have your muffler maintained by your power tool down less rapidly than conventional mufflers, always set your STIHL servicing dealer only. Such use could cause an increase in loss of control of burns do not continue work with a ...catalytic converter cools down in sets. The muffler and other parts while they may be replaced, consult your STIHL servicing dealer. !Warning! Never modify your muffler serviced and repaired by a STIHL servicing dealer. 12 MS 290, MS 310, MS 390 A modified or damaged muffler could damage the cutting attachment ...
Product Instruction Manual
Page 16
...rotate around the front handle and makes a sufficiently forceful contact with the operator. !Warning! MS 290, MS 310, MS 390 15 English / USA When a kickback occurs, the guide bar may not activate at...this guard helps protect your left hand rotates around the front handle. No Quickstop or other parts of the motor housing, clutch and oiler component and may interfere with a Quickstop chain ...of your chainsaw without hand contact. See the chapter of the hand guard on newer STIHL chainsaws can cause excessive heat, leading to stop the chain before proceeding and check ...
...rotate around the front handle and makes a sufficiently forceful contact with the operator. !Warning! MS 290, MS 310, MS 390 15 English / USA When a kickback occurs, the guide bar may not activate at...this guard helps protect your left hand rotates around the front handle. No Quickstop or other parts of the motor housing, clutch and oiler component and may interfere with a Quickstop chain ...of your chainsaw without hand contact. See the chapter of the hand guard on newer STIHL chainsaws can cause excessive heat, leading to stop the chain before proceeding and check ...
Product Instruction Manual
Page 23
... cut. When repositioning for the next cut, keep the felling cut straight. If the saw in the direction in the trunk. 22 MS 290, MS 310, MS 390 These methods are extremely dangerous because they involve the use of the guide bar nose to keep the guide bar fully engaged in ... nose. First, cut the hinge. On the last cut, do not cut a large, wide felling notch. Sectioning method For the sectioning method make the first part of the guide bar. English / USA 1 2 4 Plunge-cut method Timber having a diameter more than necessary. With the saw for large diameter trees: !...
... cut. When repositioning for the next cut, keep the felling cut straight. If the saw in the direction in the trunk. 22 MS 290, MS 310, MS 390 These methods are extremely dangerous because they involve the use of the guide bar nose to keep the guide bar fully engaged in ... nose. First, cut the hinge. On the last cut, do not cut a large, wide felling notch. Sectioning method For the sectioning method make the first part of the guide bar. English / USA 1 2 4 Plunge-cut method Timber having a diameter more than necessary. With the saw for large diameter trees: !...
Product Instruction Manual
Page 24
... of the guide bar. Extra caution must be injured. Do not work with your saw . Limbing Limbing is about to maintain control of control. MS 290, MS 310, MS 390 23 In order to reduce the risk of personal injury, never stand directly behind the tree when it is removing the branches from a fallen... be taken to fall , causing loss of the saw , you are inexperienced with partially fallen trees which are poorly supported. If you may fall , since part of the bar.
... of the guide bar. Extra caution must be injured. Do not work with your saw . Limbing Limbing is about to maintain control of control. MS 290, MS 310, MS 390 23 In order to reduce the risk of personal injury, never stand directly behind the tree when it is removing the branches from a fallen... be taken to fall , causing loss of the saw , you are inexperienced with partially fallen trees which are poorly supported. If you may fall , since part of the bar.
Product Instruction Manual
Page 26
...risk of kickback and other factors. For example, if improper tools are always clean and in the maintenance chart near the end of non-STIHL parts may be securely attached.) A loose connection between spark plug terminal and the ignition wire connector in order to remove the clutch, structural ...risk of fire and hearing loss. You can render it is used to reduce the risk of fire, never operate your instruction manual. MS 290, MS 310, MS 390 25 An improperly maintained muffler will reduce the effectiveness of the chain brake and can spot a dull chain when easy-to-cut...
...risk of kickback and other factors. For example, if improper tools are always clean and in the maintenance chart near the end of non-STIHL parts may be securely attached.) A loose connection between spark plug terminal and the ignition wire connector in order to remove the clutch, structural ...risk of fire and hearing loss. You can render it is used to reduce the risk of fire, never operate your instruction manual. MS 290, MS 310, MS 390 25 An improperly maintained muffler will reduce the effectiveness of the chain brake and can spot a dull chain when easy-to-cut...
Product Instruction Manual
Page 38
... began to fire, the combustion chamber has flooded. : set the Master Control lever to the rear. : Pull the prefilter (1) upward and out. 139BA001 KN MS 290, MS 310, MS 390 37 slot vertical. : lift off the carburetor box cover to 0. : Turn the twist lock above the rear handle counterclockwise - your saw is now disengaged... to winter operation if necessary - 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 0.
... began to fire, the combustion chamber has flooded. : set the Master Control lever to the rear. : Pull the prefilter (1) upward and out. 139BA001 KN MS 290, MS 310, MS 390 37 slot vertical. : lift off the carburetor box cover to 0. : Turn the twist lock above the rear handle counterclockwise - your saw is now disengaged... to winter operation if necessary - 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 0.
Product Instruction Manual
Page 39
... - If it is not slackened off, it can still be run at high revs (full throttle off load) for some time. As all other parts : Set Master Control lever to 15 tank fillings. The engine develops its maximum power after finishing work. During operation Check chain tension frequently A new ... greater during the break-in power - 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 may otherwise jump off the chain after about 5 to n Warm Start even if engine is correct when chain fits snugly against...
... - If it is not slackened off, it can still be run at high revs (full throttle off load) for some time. As all other parts : Set Master Control lever to 15 tank fillings. The engine develops its maximum power after finishing work. During operation Check chain tension frequently A new ... greater during the break-in power - 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 may otherwise jump off the chain after about 5 to n Warm Start even if engine is correct when chain fits snugly against...
Product Instruction Manual
Page 42
... parts of the fundamental engine parameters and components (e.g. General information The carburetor comes from the inside outward. This setting provides an optimum fuel-air mixture under most operating conditions. 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. MS 290, MS 310, MS...
... parts of the fundamental engine parameters and components (e.g. General information The carburetor comes from the inside outward. This setting provides an optimum fuel-air mixture under most operating conditions. 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. MS 290, MS 310, MS...
Product Instruction Manual
Page 44
...(leaner) If you make the setting too lean, the maximum permissible engine speed will be necessary if engine power is not satisfactory when operating 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 ...insulator nose which may be exceeded - Wrong fuel mix (too much engine oil in operation. * see "Guide to Using this Manual" MS 290, MS 310, MS 390 43 fit the cover. Spark Arresting Screen in Muffler* Adjustment for operation at high altitude A slight correction of the setting may result...
...(leaner) If you make the setting too lean, the maximum permissible engine speed will be necessary if engine power is not satisfactory when operating 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 ...insulator nose which may be exceeded - Wrong fuel mix (too much engine oil in operation. * see "Guide to Using this Manual" MS 290, MS 310, MS 390 43 fit the cover. Spark Arresting Screen in Muffler* Adjustment for operation at high altitude A slight correction of the setting may result...
Product Instruction Manual
Page 45
... much oil in the boot may pop out and uncoil during this operation. 133BA015 KN 44 MS 290, MS 310, MS 390 operating at idling speed, first check the spark plug. : Remove spark plug - Always... and cause a fire. 23 4 : Use screwdriver or suitable pliers to start or runs poorly at part load. see "Starting / Stopping the Engine". : Clean dirty spark plug. : Check electrode gap (A)...Rectify problems which have caused fouling 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 ...
... much oil in the boot may pop out and uncoil during this operation. 133BA015 KN 44 MS 290, MS 310, MS 390 operating at idling speed, first check the spark plug. : Remove spark plug - Always... and cause a fire. 23 4 : Use screwdriver or suitable pliers to start or runs poorly at part load. see "Starting / Stopping the Engine". : Clean dirty spark plug. : Check electrode gap (A)...Rectify problems which have caused fouling 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 ...
Product Instruction Manual
Page 47
... a screwdriver to carefully pry the parts of the spring out of the housing. 001BA103 KN : Lubricate the new spring with a few drops of rope off the rotor. : Fit the fan housing. If the spring pops out of children and other unauthorized persons. 46 MS 290, MS 310, MS 390 STIHL BioPlus, completely fill the chain oil...
... a screwdriver to carefully pry the parts of the spring out of the housing. 001BA103 KN : Lubricate the new spring with a few drops of rope off the rotor. : Fit the fan housing. If the spring pops out of children and other unauthorized persons. 46 MS 290, MS 310, MS 390 STIHL BioPlus, completely fill the chain oil...
Product Instruction Manual
Page 49
Select file diameter according to the shape and size of the original parts. A B A = Filing angle B = Side plate angle Chain type Rapid-Micro (RM) Rapid-Super (RS) Picco-Micro (PM/PMN) ...obtained automatically if the recommended files or sharpening tools and correct settings are used. 48 MS 290, MS 310, MS 390 and in the links and damaged rivets. : Replace any damaged or worn parts of each cutter. Other files have the wrong shape and cut. You must observe certain... sharpened - It is marked on the depth gauge end of the chain and match the new parts to chain pitch -
Select file diameter according to the shape and size of the original parts. A B A = Filing angle B = Side plate angle Chain type Rapid-Micro (RM) Rapid-Super (RS) Picco-Micro (PM/PMN) ...obtained automatically if the recommended files or sharpening tools and correct settings are used. 48 MS 290, MS 310, MS 390 and in the links and damaged rivets. : Replace any damaged or worn parts of each cutter. Other files have the wrong shape and cut. You must observe certain... sharpened - It is marked on the depth gauge end of the chain and match the new parts to chain pitch -
Product Instruction Manual
Page 52
... tendency of the depth gauge parallel to the stamped service marking (see arrow) - RSC3, RMC3, PMC3, PMMC3: The upper part of file holder with round file, flat file and filing gauge MS 290, MS 310, MS 390 51 Sharpening Tools (special accessories) Chain pitch Round file Ø Round file inch 1/4 3/8 PMN 3/8 P 0.325 3/8 0.404 (mm) mm...
... tendency of the depth gauge parallel to the stamped service marking (see arrow) - RSC3, RMC3, PMC3, PMMC3: The upper part of file holder with round file, flat file and filing gauge MS 290, MS 310, MS 390 51 Sharpening Tools (special accessories) Chain pitch Round file Ø Round file inch 1/4 3/8 PMN 3/8 P 0.325 3/8 0.404 (mm) mm...
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
... will make re-ordering simpler. Model Serial number Users of this Owner's Manual. 58 MS 290, MS 310, MS 390 Warranty claims following repairs can be performed only by authorized STIHL service shops. English / USA Special Accessories Ordering Spare Parts Maintenance and Repairs Contact your STIHL dealer for your saw model, serial number as well as the...
... will make re-ordering simpler. Model Serial number Users of this Owner's Manual. 58 MS 290, MS 310, MS 390 Warranty claims following repairs can be performed only by authorized STIHL service shops. English / USA Special Accessories Ordering Spare Parts Maintenance and Repairs Contact your STIHL dealer for your saw model, serial number as well as the...