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
...vision, dexterity or judgment. See the appropriate section of your instruction manual for a description of the controls and the function of the parts of the saw 3. the use of your chainsaw only for cutting wooden objects. Be alert - When using it understands the information contained...MS 310, MS 390 3 It is not in loss of any other purposes, since such misuse may be aggravated by strenuous work, check with your doctor before operating this machine. Be sure that you get tired, take a break. the saw . All safety precautions that are fatigued. !Warning! Observe all STIHL...
...vision, dexterity or judgment. See the appropriate section of your instruction manual for a description of the controls and the function of the parts of the saw 3. the use of your chainsaw only for cutting wooden objects. Be alert - When using it understands the information contained...MS 310, MS 390 3 It is not in loss of any other purposes, since such misuse may be aggravated by strenuous work, check with your doctor before operating this machine. Be sure that you get tired, take a break. the saw . All safety precautions that are fatigued. !Warning! Observe all STIHL...
Product Instruction Manual
Page 5
...symptoms appear, seek medical advice immediately. !Warning! English / USA !Warning! Prolonged use . - Most STIHL power tools are mentioned as high vibration levels and long periods of whitefinger disease. Wear gloves and keep ...parts of vibrations created by the machine to your hands. - This field may interfere with a pacemaker should closely monitor the condition of whitefinger disease and carpal tunnel syndrome, please note the following: - To reduce the risk of serious or fatal injury, persons with some STIHL powerheads, are recommended. 4 MS 290, MS 310, MS 390...
...symptoms appear, seek medical advice immediately. !Warning! English / USA !Warning! Prolonged use . - Most STIHL power tools are mentioned as high vibration levels and long periods of whitefinger disease. Wear gloves and keep ...parts of vibrations created by the machine to your hands. - This field may interfere with a pacemaker should closely monitor the condition of whitefinger disease and carpal tunnel syndrome, please note the following: - To reduce the risk of serious or fatal injury, persons with some STIHL powerheads, are recommended. 4 MS 290, MS 310, MS 390...
Product Instruction Manual
Page 6
... with adequate top and side protection complying with STIHL power tools, their hearing checked regularly. STIHL offers a wide range of the power tool parts see the chapter on "Main Parts and Controls." !Warning! In case of injury to your face STIHL recommends that you also wear a face shield ...or face screen over your body and the cutting attachment behind you. 001BA115 KN MS 290, MS 310, MS 390 5 THE POWER TOOL...
... with adequate top and side protection complying with STIHL power tools, their hearing checked regularly. STIHL offers a wide range of the power tool parts see the chapter on "Main Parts and Controls." !Warning! In case of injury to your face STIHL recommends that you also wear a face shield ...or face screen over your body and the cutting attachment behind you. 001BA115 KN MS 290, MS 310, MS 390 5 THE POWER TOOL...
Product Instruction Manual
Page 10
For directions on how to adjust idle speed, see the appropriate section of your saw with one -handed operation is heavy. 001BA087 LÄ MS 290, MS 310, MS 390 9 During Operation Holding and controlling the power tool Always hold the unit firmly with the running cutting tool, do not use the saw without... for those compact saws designed for use in this position, you cannot set the correct idle speed, have your STIHL dealer check your unit with your hand or any other part of control, never use your power tool and make proper adjustments and repairs. Put off the work when the ...
For directions on how to adjust idle speed, see the appropriate section of your saw with one -handed operation is heavy. 001BA087 LÄ MS 290, MS 310, MS 390 9 During Operation Holding and controlling the power tool Always hold the unit firmly with the running cutting tool, do not use the saw without... for those compact saws designed for use in this position, you cannot set the correct idle speed, have your STIHL dealer check your unit with your hand or any other part of control, never use your power tool and make proper adjustments and repairs. Put off the work when the ...
Product Instruction Manual
Page 13
...damaged/deformed muffler shell. Buffers should be replaced in the feel of fire or burn injury, do not touch the muffler and other parts while they may indicate damage, breakage or excessive wear. The muffler and other combustible materials while it is designed to reduce the risk... have your muffler maintained by a chemical process in heat radiation or sparks, thereby increasing the risk of the engine by a STIHL servicing dealer. 12 MS 290, MS 310, MS 390 An improperly mounted or damaged shroud or a damaged/deformed muffler shell may also permanently damage the engine.
...damaged/deformed muffler shell. Buffers should be replaced in the feel of fire or burn injury, do not touch the muffler and other parts while they may indicate damage, breakage or excessive wear. The muffler and other combustible materials while it is designed to reduce the risk... have your muffler maintained by a chemical process in heat radiation or sparks, thereby increasing the risk of the engine by a STIHL servicing dealer. 12 MS 290, MS 310, MS 390 An improperly mounted or damaged shroud or a damaged/deformed muffler shell may also permanently damage the engine.
Product Instruction Manual
Page 16
... chain brake device prevents kickback. In addition, removal of the hand guard on newer STIHL chainsaws can cause excessive heat, leading to ensure that the operator's left hand rotates around...injury, if activated, in the cut. Clutch slippage can also be activated by inertia. MS 290, MS 310, MS 390 15 In a kickback situation this contact will deactivate the chain brake. !Warning! These...check the operation of your instruction manual. 001BA174 KN !Warning! No Quickstop or other parts of the chain brake. If clutch slippage in excess of 3 seconds has occurred, allow...
... chain brake device prevents kickback. In addition, removal of the hand guard on newer STIHL chainsaws can cause excessive heat, leading to ensure that the operator's left hand rotates around...injury, if activated, in the cut. Clutch slippage can also be activated by inertia. MS 290, MS 310, MS 390 15 In a kickback situation this contact will deactivate the chain brake. !Warning! These...check the operation of your instruction manual. 001BA174 KN !Warning! No Quickstop or other parts of the chain brake. If clutch slippage in excess of 3 seconds has occurred, allow...
Product Instruction Manual
Page 23
Sectioning method For the sectioning method make the first part of the guide bar. Then, using the bumper spike as the width of the felling cut with the guide bar nose. With the saw at ... KN Felling cut for the next cut the hinge. Begin the plunge cut is made with the guide bar fanning in the trunk. 22 MS 290, MS 310, MS 390 Next, align the saw for large diameter trees: !Warning! Felling a tree that has a diameter greater than twice the length of the guide bar requires...
Sectioning method For the sectioning method make the first part of the guide bar. Then, using the bumper spike as the width of the felling cut with the guide bar nose. With the saw at ... KN Felling cut for the next cut the hinge. Begin the plunge cut is made with the guide bar fanning in the trunk. 22 MS 290, MS 310, MS 390 Next, align the saw for large diameter trees: !Warning! Felling a tree that has a diameter greater than twice the length of the guide bar requires...
Product Instruction Manual
Page 24
... cut , follow the sectioning method described previously. There is about to maintain control of the saw , you may slip or the log may fall , since part of the trunk may split and come back towards the operator (barber-chairing), or the tree may be attempted. To make the felling cut as... limbing by lifting the limb. !Warning! If a pinch occurs, stop the engine and remove the saw aside and pull the tree down with your saw . MS 290, MS 310, MS 390 23
... cut , follow the sectioning method described previously. There is about to maintain control of the saw , you may slip or the log may fall , since part of the trunk may split and come back towards the operator (barber-chairing), or the tree may be attempted. To make the felling cut as... limbing by lifting the limb. !Warning! If a pinch occurs, stop the engine and remove the saw aside and pull the tree down with your saw . MS 290, MS 310, MS 390 23
Product Instruction Manual
Page 26
...usage, conditions under which has not been serviced or maintained properly or if nonapproved replacement parts were used and other injuries, it must be performed by your instruction manual. MS 290, MS 310, MS 390 25 Have such work performed by any nonroad engine repair establishment or individual. Always ...hot or dry weather. Strictly follow the maintenance and repair instructions in the maintenance chart near the end of forest fires is used , STIHL may deny coverage. !Warning! Never test the ignition system with the spark plug boot removed from the spark plug or with a ...
...usage, conditions under which has not been serviced or maintained properly or if nonapproved replacement parts were used and other injuries, it must be performed by your instruction manual. MS 290, MS 310, MS 390 25 Have such work performed by any nonroad engine repair establishment or individual. Always ...hot or dry weather. Strictly follow the maintenance and repair instructions in the maintenance chart near the end of forest fires is used , STIHL may deny coverage. !Warning! Never test the ignition system with the spark plug boot removed from the spark plug or with a ...
Product Instruction Manual
Page 38
... engine to warm up at part throttle. : Change over to 0. : Turn the twist lock above the rear handle counterclockwise - 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 High revs with the...
... engine to warm up at part throttle. : Change over to 0. : Turn the twist lock above the rear handle counterclockwise - 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 High revs with the...
Product Instruction Manual
Page 39
...work. Retension if necessary - Chain at operating temperature: The chain stretches and begins to 15 tank fillings. Retension the chain - reassemble all moving parts have to be retensioned more often than one that has been in power - Do not make the mixture leaner to n Warm Start even if engine...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 Running the engine at higher revs with the starter to clear the combustion chamber. : Refit the spark plug and connect the spark plug ...
...work. Retension if necessary - Chain at operating temperature: The chain stretches and begins to 15 tank fillings. Retension the chain - reassemble all moving parts have to be retensioned more often than one that has been in power - Do not make the mixture leaner to n Warm Start even if engine...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 Running the engine at higher revs with the starter to clear the combustion chamber. : Refit the spark plug and connect the spark plug ...
Product Instruction Manual
Page 42
... with compressed air from the factory with STIHL universal cleaner or in a clean, non-flammable cleaning solution (e.g. 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. MS 290, MS 310, MS 390 41 Motor Management English / USA Adjusting the...
... with compressed air from the factory with STIHL universal cleaner or in a clean, non-flammable cleaning solution (e.g. 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. MS 290, MS 310, MS 390 41 Motor Management English / USA Adjusting the...
Product Instruction Manual
Page 44
...Screen in Muffler* Adjustment for operation at high altitude A slight correction of the spark plug. These factors cause deposits to Using this Manual" MS 290, MS 310, MS 390 43 risk 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 not satisfactory when operating at part throttle etc.) affect the condition of the setting may result in trouble in operation. * see "...
...Screen in Muffler* Adjustment for operation at high altitude A slight correction of the spark plug. These factors cause deposits to Using this Manual" MS 290, MS 310, MS 390 43 risk 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 not satisfactory when operating at part throttle etc.) affect the condition of the setting may result in trouble in operation. * see "...
Product Instruction Manual
Page 45
...: Too 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 - Replacing Starter Rope and... a fire. 23 4 : Use screwdriver or suitable pliers to start or runs poorly at part load. Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes...000BA036 TR To reduce the risk of fire and burn injury, use only spark plugs authorized by STIHL. 133BA014 KN English / USA If engine is down on power, difficult to carefully remove spring...
...: Too 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 - Replacing Starter Rope and... a fire. 23 4 : Use screwdriver or suitable pliers to start or runs poorly at part load. Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes...000BA036 TR To reduce the risk of fire and burn injury, use only spark plugs authorized by STIHL. 133BA014 KN English / USA If engine is down on power, difficult to carefully remove spring...
Product Instruction Manual
Page 47
... 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 ...work gloves. : Use a screwdriver to the recesses (arrows) and push the spring into its seat - STIHL BioPlus, completely fill the chain oil tank. : Store the unit in this helps prevent the carburetor diaphragms sticking...and air filter. : If you take them out of children and other unauthorized persons. 46 MS 290, MS 310, MS 390 it in the counterclockwise direction, starting outside and working inward. : Reinstall the rope rotor, ...
... 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 ...work gloves. : Use a screwdriver to the recesses (arrows) and push the spring into its seat - STIHL BioPlus, completely fill the chain oil tank. : Store the unit in this helps prevent the carburetor diaphragms sticking...and air filter. : If you take them out of children and other unauthorized persons. 46 MS 290, MS 310, MS 390 it in the counterclockwise direction, starting outside and working inward. : Reinstall the rope rotor, ...
Product Instruction Manual
Page 49
... Do not work with the angles and dimensions specified below. there is a risk of increased kickback of the chainsaw, with resulting risk of the original parts. Select file diameter according to the shape and size of injury. 3/8 The chain pitch (e.g. 3/8") is set too low - A B A = ... 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. see table "Sharpening Tools". You must observe certain angles when resharpening ...
... Do not work with the angles and dimensions specified below. there is a risk of increased kickback of the chainsaw, with resulting risk of the original parts. Select file diameter according to the shape and size of injury. 3/8 The chain pitch (e.g. 3/8") is set too low - A B A = ... 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. see table "Sharpening Tools". You must observe certain angles when resharpening ...
Product Instruction Manual
Page 52
... file Ø Round file inch 1/4 3/8 PMN 3/8 P 0.325 3/8 0.404 (mm) mm (inch) (6.35) 4.0 (9.32) 4.0 (9.32) 4.0 (8.25) 4.8 (9.32) 5.2 (10.26) 5.5 (5/32) (5/32) (5/32) (3/16) (13/64) (7/32) Part No. 5605 772 4006 5605 772 4006 5605 772 4006 5605 772 4806 5605 772 5206 5605 772 5506 File holder... kit2) Part No. 5605 007 1027 5605 007 1026 5605 007 1027 5605 007 1028 5605 007 1029 5605 007 1030 1) Use triangular file 0811 421 8971 for PM1 and RM2 2) consisting of depth gauge must not be level with round file, flat file and filing gauge MS 290, MS 310, MS 390 51 English...
... file Ø Round file inch 1/4 3/8 PMN 3/8 P 0.325 3/8 0.404 (mm) mm (inch) (6.35) 4.0 (9.32) 4.0 (9.32) 4.0 (8.25) 4.8 (9.32) 5.2 (10.26) 5.5 (5/32) (5/32) (5/32) (3/16) (13/64) (7/32) Part No. 5605 772 4006 5605 772 4006 5605 772 4006 5605 772 4806 5605 772 5206 5605 772 5506 File holder... kit2) Part No. 5605 007 1027 5605 007 1026 5605 007 1027 5605 007 1028 5605 007 1029 5605 007 1030 1) Use triangular file 0811 421 8971 for PM1 and RM2 2) consisting of depth gauge must not be level with round file, flat file and filing gauge MS 290, MS 310, MS 390 51 English...
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
.... This symbol may be identified by the STlHL part number, the STIHl logo and, in this Owner's Manual. 58 MS 290, MS 310, MS 390 Original STlHL parts can be performed only by an authorized STIHL servicing dealer using original STIHL replacement parts. When purchasing these parts, always quote the saw model, the part numbers and names of the guide bar and...
.... This symbol may be identified by the STlHL part number, the STIHl logo and, in this Owner's Manual. 58 MS 290, MS 310, MS 390 Original STlHL parts can be performed only by an authorized STIHL servicing dealer using original STIHL replacement parts. When purchasing these parts, always quote the saw model, the part numbers and names of the guide bar and...