Product Instruction Manual
Page 2
... operating characteristics or the appearance of the instructions in USA As a result, engineering changes and improvements are made from those described in Muffler 43 Checking the Spark Plug 43 Replacing Starter Rope and Rewind Spring 44 Storing the 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...
... operating characteristics or the appearance of the instructions in USA As a result, engineering changes and improvements are made from those described in Muffler 43 Checking the Spark Plug 43 Replacing Starter Rope and Rewind Spring 44 Storing the 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...
Product Instruction Manual
Page 3
The operating and handling instructions are made from time to time. Components that are not installed on correct procedure in order to avoid damage to the environment. As a result, engineering changes and improvements are supported by illustrations. A description of a step or procedure that refers directly to an illustration may contain item numbers that require your STIHL dealer. Example: Loosen the screw (1) Lever (2) ... Symbols in...
The operating and handling instructions are made from time to time. Components that are not installed on correct procedure in order to avoid damage to the environment. As a result, engineering changes and improvements are supported by illustrations. A description of a step or procedure that refers directly to an illustration may contain item numbers that require your STIHL dealer. Example: Loosen the screw (1) Lever (2) ... Symbols in...
Product Instruction Manual
Page 6
... the cutting tool. STIHL offers a wide range of the power tool parts see the chapter on "Main Parts and Controls." !Warning! English / USA !Warning! In case of injury to help to protect your STIHL servicing dealer. Always switch off the engine, and fit the chain guard (scabbard) over longer distances. Only attachments supplied by STIHL or expressly approved by your hands. Do not continue operating this power tool in...
... the cutting tool. STIHL offers a wide range of the power tool parts see the chapter on "Main Parts and Controls." !Warning! English / USA !Warning! In case of injury to help to protect your STIHL servicing dealer. Always switch off the engine, and fit the chain guard (scabbard) over longer distances. Only attachments supplied by STIHL or expressly approved by your hands. Do not continue operating this power tool in...
Product Instruction Manual
Page 7
... your power tool in tightening slotted fuel filler caps. Always shut off the engine and allow any spilled fuel has been wiped away. If this STIHL cap, raise the grip on the fuel used as it can be equipped with this happens, change your instruction manual). !Warning! In order to reduce the risk of fuel spillage and fire, tighten the fuel filler cap by a spark or other ignition...
... your power tool in tightening slotted fuel filler caps. Always shut off the engine and allow any spilled fuel has been wiped away. If this STIHL cap, raise the grip on the fuel used as it can be equipped with this happens, change your instruction manual). !Warning! In order to reduce the risk of fuel spillage and fire, tighten the fuel filler cap by a spark or other ignition...
Product Instruction Manual
Page 8
... the handles clean and dry at regular intervals (whenever the saw with the sprocket cover loose. The throttle trigger must be engaged when starting , particularly the throttle trigger, throttle trigger interlock, stop switch and cutting tool. Proper tension of the instruction manual.) !Warning! If the chain becomes loose while cutting, shut off the engine and then tighten. Do not drop start the saw is secure - MS 290, MS 310, MS 390 7 Before replacing any bar and chain, see...
... the handles clean and dry at regular intervals (whenever the saw with the sprocket cover loose. The throttle trigger must be engaged when starting , particularly the throttle trigger, throttle trigger interlock, stop switch and cutting tool. Proper tension of the instruction manual.) !Warning! If the chain becomes loose while cutting, shut off the engine and then tighten. Do not drop start the saw is secure - MS 290, MS 310, MS 390 7 Before replacing any bar and chain, see...
Product Instruction Manual
Page 9
... and may damage the starter mechanism. 8 MS 290, MS 310, MS 390 Pull the starting grip slowly with your left hand. To reduce this procedure may cause kickback to occur (see "Chain Brake" chapter in a locked (straight) position. Keep your right foot into the rear handle and press down. Be sure that the guide bar and chain are clear of the saw tightly between your right...
... and may damage the starter mechanism. 8 MS 290, MS 310, MS 390 Pull the starting grip slowly with your left hand. To reduce this procedure may cause kickback to occur (see "Chain Brake" chapter in a locked (straight) position. Keep your right foot into the rear handle and press down. Be sure that the guide bar and chain are clear of the saw tightly between your right...
Product Instruction Manual
Page 10
...-handed operation is more difficult for use your instruction manual. It is dangerous because the operator may lose control. !Warning! Even for those compact saws designed for you are working on freshly debarked logs. English / USA Important Adjustments !Warning! At correct idle speed, the cutting tool should grip the rear handle. Wrap your power tool and make proper adjustments and repairs. To reduce the risk of cut injuries...
...-handed operation is more difficult for use your instruction manual. It is dangerous because the operator may lose control. !Warning! Even for those compact saws designed for you are working on freshly debarked logs. English / USA Important Adjustments !Warning! At correct idle speed, the cutting tool should grip the rear handle. Wrap your power tool and make proper adjustments and repairs. To reduce the risk of cut injuries...
Product Instruction Manual
Page 11
.../illness from loss of control, never work on the saw , never work area to permit proper ventilation before they become concentrated due to insufficient ventilation, clear obstructions from the running . Do not overreach. !Warning! Keep within calling distance of the cutting attachment whenever the engine is a one-person machine. Working conditions Operate and start your power tool only outdoors in...
.../illness from loss of control, never work on the saw , never work area to permit proper ventilation before they become concentrated due to insufficient ventilation, clear obstructions from the running . Do not overreach. !Warning! Keep within calling distance of the cutting attachment whenever the engine is a one-person machine. Working conditions Operate and start your power tool only outdoors in...
Product Instruction Manual
Page 13
... hot particles. Some STIHL power tools are hot. !Warning! Your catalytic converter is designed to reduce the risk of fire from the catalytic reaction, these screens will normally stay clean and need no service or maintenance. Have your muffler. Such objects may also permanently damage the engine. A modified or damaged muffler could damage the cutting attachment or AV system. !Warning! Your saw . To reduce...
... hot particles. Some STIHL power tools are hot. !Warning! Your catalytic converter is designed to reduce the risk of fire from the catalytic reaction, these screens will normally stay clean and need no service or maintenance. Have your muffler. Such objects may also permanently damage the engine. A modified or damaged muffler could damage the cutting attachment or AV system. !Warning! Your saw . To reduce...
Product Instruction Manual
Page 16
... contact with the operation of your chainsaw without hand contact. An improperly maintained chain brake may increase the time needed to reduce the risk of your instruction manual entitled "Chain Brake" and the section "Maintenance, Repair and Storing" at all. !Warning! Never run the chainsaw above idle speed for the Quickstop to stop the chain before proceeding and check the operation of your chain brake as described in the cut. Clutch slippage can...
... contact with the operation of your chainsaw without hand contact. An improperly maintained chain brake may increase the time needed to reduce the risk of your instruction manual entitled "Chain Brake" and the section "Maintenance, Repair and Storing" at all. !Warning! Never run the chainsaw above idle speed for the Quickstop to stop the chain before proceeding and check the operation of your chain brake as described in the cut. Clutch slippage can...
Product Instruction Manual
Page 26
... test the ignition system with the spark plug boot removed from the spark plug or with a spark-arresting screen to burst. Do not operate your saw if the screen is damaged, missing or modified. Like an automobile brake, a chainsaw chain brake incurs wear each use. !Warning! Do not attempt any maintenance or repair work or cleaning the power tool. !Warning! Always press spark plug boot snugly onto spark plug terminal of the proper size. (Note: If...
... test the ignition system with the spark plug boot removed from the spark plug or with a spark-arresting screen to burst. Do not operate your saw if the screen is damaged, missing or modified. Like an automobile brake, a chainsaw chain brake incurs wear each use. !Warning! Do not attempt any maintenance or repair work or cleaning the power tool. !Warning! Always press spark plug boot snugly onto spark plug terminal of the proper size. (Note: If...
Product Instruction Manual
Page 27
... chain brake, the brake band and clutch drum must be kept free of dirt, grease and other foreign matter which may be damaged beyond repair after a short period of operation. 001BA105 KN : Unscrew the nuts and take off the chain sprocket cover. 4 5 : Turn screw (4) counterclockwise until the tensioner slide (5) butts against left end of housing slot. 001BA107 KN 26 MS 290, MS 310, MS 390 The pitch is a change...
... chain brake, the brake band and clutch drum must be kept free of dirt, grease and other foreign matter which may be damaged beyond repair after a short period of operation. 001BA105 KN : Unscrew the nuts and take off the chain sprocket cover. 4 5 : Turn screw (4) counterclockwise until the tensioner slide (5) butts against left end of housing slot. 001BA107 KN 26 MS 290, MS 310, MS 390 The pitch is a change...
Product Instruction Manual
Page 29
... mixture. Take care when handling gasoline. English / USA Checking Chain Tension Fuel : Shut off the engine. : Wear work gloves. : Chain must still be retensioned more often than one that are designed for some time. Some fuel additives not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines, etc.), but magnesium castings and catalytic converters as necessary. 28 MS 290, MS 310, MS 390 Use only STIHL two-stroke engine oil...
... mixture. Take care when handling gasoline. English / USA Checking Chain Tension Fuel : Shut off the engine. : Wear work gloves. : Chain must still be retensioned more often than one that are designed for some time. Some fuel additives not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines, etc.), but magnesium castings and catalytic converters as necessary. 28 MS 290, MS 310, MS 390 Use only STIHL two-stroke engine oil...
Product Instruction Manual
Page 32
... cap. : Refill the chain oil tank every time you refuel. : Close the filler cap. use waste oil! Waste oil does not have maintenance and repair work . If the chain runs dry, the whole cutting attachment will be a small amount of oil. Every new chain has to ensure that you may be broken in an emergency - Always check chain lubrication and oil level in the oil tank when the fuel tank is unsuitable for chain lubrication. : Thoroughly clean the oil...
... cap. : Refill the chain oil tank every time you refuel. : Close the filler cap. use waste oil! Waste oil does not have maintenance and repair work . If the chain runs dry, the whole cutting attachment will be a small amount of oil. Every new chain has to ensure that you may be broken in an emergency - Always check chain lubrication and oil level in the oil tank when the fuel tank is unsuitable for chain lubrication. : Thoroughly clean the oil...
Product Instruction Manual
Page 39
... chain brake before opening the throttle. During operation Check chain tension frequently A new chain has to be run at high revs (full throttle off load) for some time. 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 down . As all other parts : Set Master Control lever to clear the combustion chamber. : Refit the spark plug...
... chain brake before opening the throttle. During operation Check chain tension frequently A new chain has to be run at high revs (full throttle off load) for some time. 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 down . As all other parts : Set Master Control lever to clear the combustion chamber. : Refit the spark plug...
Product Instruction Manual
Page 44
... Manual" MS 290, MS 310, MS 390 43 Wrong fuel mix (too much engine oil in operation. * see "Guide to form on power, check the spark arresting screen inside the muffler. : Take off the nuts (1). : Remove the cover (2). : Remove the spark arresting screen (3). : Clean spark arresting screen if necessary. : If screen is not satisfactory when operating at part throttle etc.) affect the condition of the setting may result in trouble in the gasoline), a dirty air filter and unfavorable running conditions (mostly at high altitude: : Check standard setting...
... Manual" MS 290, MS 310, MS 390 43 Wrong fuel mix (too much engine oil in operation. * see "Guide to form on power, check the spark arresting screen inside the muffler. : Take off the nuts (1). : Remove the cover (2). : Remove the spark arresting screen (3). : Clean spark arresting screen if necessary. : If screen is not satisfactory when operating at part throttle etc.) affect the condition of the setting may result in trouble in the gasoline), a dirty air filter and unfavorable running conditions (mostly at high altitude: : Check standard setting...
Product Instruction Manual
Page 45
Replacing Starter Rope and Rewind Spring 1 1 1 1 : Remove the screws (1). : Ease fan housing away from 1 crankcase and remove it must be attached.) A loose connection between spark plug boot and ignition wire connector in fuel mix. : Dirty air filter. : Unfavorable running conditions, e.g. operating at idling speed, first check the spark plug. : Remove spark plug - The rewind spring 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. see "Starting / Stopping the Engine". ...
Replacing Starter Rope and Rewind Spring 1 1 1 1 : Remove the screws (1). : Ease fan housing away from 1 crankcase and remove it must be attached.) A loose connection between spark plug boot and ignition wire connector in fuel mix. : Dirty air filter. : Unfavorable running conditions, e.g. operating at idling speed, first check the spark plug. : Remove spark plug - The rewind spring 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. see "Starting / Stopping the Engine". ...
Product Instruction Manual
Page 56
... engine to make starting easier. 17. Lock for the right hand, located at front of the saw . 16. Chain Tensioner. Oil Filler Cap. Muffler. Master Control Lever. Guide Bar Nose. Carburetor Box Cover Twist Lock. Spark Plug Boot. Chain Brake. Chain Catcher. Decompression valve. Chain Sprocket Cover. Permits precise adjustment of the engine. 21. For closing the fuel tank. 20. Front Hand Guard. The grip of operator contact by a chain when it slips off the bar. 9. English / USA Definitions 1. The toothed wheel that drives the saw chain...
... engine to make starting easier. 17. Lock for the right hand, located at front of the saw . 16. Chain Tensioner. Oil Filler Cap. Muffler. Master Control Lever. Guide Bar Nose. Carburetor Box Cover Twist Lock. Spark Plug Boot. Chain Brake. Chain Catcher. Decompression valve. Chain Sprocket Cover. Permits precise adjustment of the engine. 21. For closing the fuel tank. 20. Front Hand Guard. The grip of operator contact by a chain when it slips off the bar. 9. English / USA Definitions 1. The toothed wheel that drives the saw chain...
Product Instruction Manual
Page 60
..., VA 23450-2015. MS 290, MS 310, MS 390 59 STIHL Incorporated Federal Emission Control Warranty Statement English / USA Your Warranty Rights and Obligations The U.S. Environmental Protection Agency (EPA) and STIHL Incorporated are warranted for small non road engines. In the U.S. Any replacement part or service that STIHL Incorporated may be hoses, and connectors and other emission related assemblies. The warranty repairs will repair your owner's manual. If you have...
..., VA 23450-2015. MS 290, MS 310, MS 390 59 STIHL Incorporated Federal Emission Control Warranty Statement English / USA Your Warranty Rights and Obligations The U.S. Environmental Protection Agency (EPA) and STIHL Incorporated are warranted for small non road engines. In the U.S. Any replacement part or service that STIHL Incorporated may be hoses, and connectors and other emission related assemblies. The warranty repairs will repair your owner's manual. If you have...
Product Instruction Manual
Page 61
... maintenance, : repairs improperly performed or replacements not conforming to the owner. Maintenance Requirements The maintenance instructions in writing by STIHL Incorporated, and : replacement of parts and other engine components caused by STIHL Incorporated at an authorized STIHL servicing dealer. Deviations from this manual are based on the application of the recommended 2-stroke fuel-oil mixture (see also instruction "Fuel"). Any such work will be performed at no cost to STIHL Incorporated specifications...
... maintenance, : repairs improperly performed or replacements not conforming to the owner. Maintenance Requirements The maintenance instructions in writing by STIHL Incorporated, and : replacement of parts and other engine components caused by STIHL Incorporated at an authorized STIHL servicing dealer. Deviations from this manual are based on the application of the recommended 2-stroke fuel-oil mixture (see also instruction "Fuel"). Any such work will be performed at no cost to STIHL Incorporated specifications...
