Product Instruction Manual
Page 2
... 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 to reduce the risk...operating characteristics or the appearance of Guide Bar 39 Air Filter System 40 Cleaning Air Filter 40 Motor Management 41 Adjusting the Carburetor 41 Spark Arresting Screen in this Manual, please contact your chainsaw differs from time-to Using this Manual 2 Safety Precautions ...
... 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 to reduce the risk...operating characteristics or the appearance of Guide Bar 39 Air Filter System 40 Cleaning Air Filter 40 Motor Management 41 Adjusting the Carburetor 41 Spark Arresting Screen in this Manual, please contact your chainsaw differs from time-to Using this Manual 2 Safety Precautions ...
Product Instruction Manual
Page 26
.... Like an automobile brake, a chainsaw chain brake incurs wear each use. !Warning! MS 290, MS 310, MS 390 25 Always stop the engine and make sure that the risk of forest fires is...make sure it must be properly maintained. Wear gloves when handling or performing maintenance on your STIHL chainsaw to cut wood becomes hard to properly perform its function of reducing the risk of... kickback and other factors. Tighten all nuts, bolts and screws except the carburetor adjustment screws after each time it inoperable. Use of the instruction manual. !Warning! replace ...
.... Like an automobile brake, a chainsaw chain brake incurs wear each use. !Warning! MS 290, MS 310, MS 390 25 Always stop the engine and make sure that the risk of forest fires is...make sure it must be properly maintained. Wear gloves when handling or performing maintenance on your STIHL chainsaw to cut wood becomes hard to properly perform its function of reducing the risk of... kickback and other factors. Tighten all nuts, bolts and screws except the carburetor adjustment screws after each time it inoperable. Use of the instruction manual. !Warning! replace ...
Product Instruction Manual
Page 29
... before filling. 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 For this reason STIHL recommends that are designed for use in air cooled two-cycle ...engines. Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils ...
... before filling. 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 For this reason STIHL recommends that are designed for use in air cooled two-cycle ...engines. Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils ...
Product Instruction Manual
Page 34
...brake is necessary to normal wear. It is subject to have it serviced 1 and maintained regularly by trained personnel, such as your STIHL servicing dealer, at the following intervals: 139BA016 KN Full-time professional users: Semi-professional users (in agriculture and construction): Hobby and occasional... +10 °C (50°F): : Turn the twist lock above the rear 2 handle counterclockwise - slot vertical. : Lift off the carburetor box cover to the rear. : Pull prefilter (1) upward and out. : Pull off the spark plug boot (2). 139BA002 KN MS 290, MS 310, MS 390 33
...brake is necessary to normal wear. It is subject to have it serviced 1 and maintained regularly by trained personnel, such as your STIHL servicing dealer, at the following intervals: 139BA016 KN Full-time professional users: Semi-professional users (in agriculture and construction): Hobby and occasional... +10 °C (50°F): : Turn the twist lock above the rear 2 handle counterclockwise - slot vertical. : Lift off the carburetor box cover to the rear. : Pull prefilter (1) upward and out. : Pull off the spark plug boot (2). 139BA002 KN MS 290, MS 310, MS 390 33
Product Instruction Manual
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..., i.e. English / USA Information Before You Start STOP 1 0 139BA018 KN 1 001BA140 KN 139BA019 KN 139BA005 TR : Use a screwdriver to start a cold engine. 34 MS 290, MS 310, MS 390 this helps prevent carburetor icing. To move the Master Control lever from the shroud. : Turn the shutter 180° and refit it on the left of the...
..., i.e. English / USA Information Before You Start STOP 1 0 139BA018 KN 1 001BA140 KN 139BA019 KN 139BA005 TR : Use a screwdriver to start a cold engine. 34 MS 290, MS 310, MS 390 this helps prevent carburetor icing. To move the Master Control lever from the shroud. : Turn the shutter 180° and refit it on the left of the...
Product Instruction Manual
Page 38
..., 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 - see "Winter Operation". 139BA016...
..., 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 - see "Winter Operation". 139BA016...
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 may otherwise jump off the chain after about 5 to clear the combustion chamber. : Refit the spark plug and connect the... the spark plug boot (2). : Unscrew and dry off , it can still be pulled along the bar by hand. Retension the chain - see "Adjusting Carburetor". During operation Check chain tension frequently A new chain has to achieve an apparent increase in the engine are greater during the break-in period A factory...
... 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 may otherwise jump off the chain after about 5 to clear the combustion chamber. : Refit the spark plug and connect the... the spark plug boot (2). : Unscrew and dry off , it can still be pulled along the bar by hand. Retension the chain - see "Adjusting Carburetor". During operation Check chain tension frequently A new chain has to achieve an apparent increase in the engine are greater during the break-in period A factory...
Product Instruction Manual
Page 40
...time you sharpen the chain and every time you have retensioned it could damage the crankshaft and bearings. This protects engine-mounted components (ignition, carburetor) from sources of lubricant. 3 1 3 : Turn the bar over - Storing your saw for a short period: Wait for different ...replace the chain - turn adjusting screw clockwise. : To reduce oil feed - with a film of ignition, until you need it again. MS 290, MS 310, MS 390 * Special accessory * see "Guide to Using this helps avoid one-sided wear, especially at operating temperature during cutting work : Slacken...
...time you sharpen the chain and every time you have retensioned it could damage the crankshaft and bearings. This protects engine-mounted components (ignition, carburetor) from sources of lubricant. 3 1 3 : Turn the bar over - Storing your saw for a short period: Wait for different ...replace the chain - turn adjusting screw clockwise. : To reduce oil feed - with a film of ignition, until you need it again. MS 290, MS 310, MS 390 * Special accessory * see "Guide to Using this helps avoid one-sided wear, especially at operating temperature during cutting work : Slacken...
Product Instruction Manual
Page 41
...: : Press down the throttle trigger interlock and set Master Control lever to "Cold Start" l. : Turn the twist lock above the rearhandle counterclockwise. : Lift off the carburetor box cover to the rear. : Clean away loose dirt from around filter. * see "Guide to suit different operating conditions by simply installing a choice of the... 3/8" P 1/4" 3/8"; 0.325" 0.404" Minimum groove depth 0.20" (5.0 mm) 0.16" (4.0 mm) 0.24" (6.0 mm) 0.28" (7.0 mm) The air filter system can be adapted to Using this Manual" 40 MS 290, MS 310, MS 390
...: : Press down the throttle trigger interlock and set Master Control lever to "Cold Start" l. : Turn the twist lock above the rearhandle counterclockwise. : Lift off the carburetor box cover to the rear. : Clean away loose dirt from around filter. * see "Guide to suit different operating conditions by simply installing a choice of the... 3/8" P 1/4" 3/8"; 0.325" 0.404" Minimum groove depth 0.20" (5.0 mm) 0.16" (4.0 mm) 0.24" (6.0 mm) 0.28" (7.0 mm) The air filter system can be adapted to Using this Manual" 40 MS 290, MS 310, MS 390
Product Instruction Manual
Page 42
...and dry all parts of stubborn dirt: : Wash with STIHL universal cleaner or in a clean, non-flammable cleaning solution (e.g. With this carburetor it out with a standard setting. Motor Management English / USA Adjusting the Carburetor 1 3 22 Exhaust emissions are controlled by the design of... your hand or blow it is only possible to clean the fleece filter element : Always replace damaged filterelements. : Reinstall the filters. MS 290, MS 310, MS 390 41 Never use a brush...
...and dry all parts of stubborn dirt: : Wash with STIHL universal cleaner or in a clean, non-flammable cleaning solution (e.g. With this carburetor it out with a standard setting. Motor Management English / USA Adjusting the Carburetor 1 3 22 Exhaust emissions are controlled by the design of... your hand or blow it is only possible to clean the fleece filter element : Always replace damaged filterelements. : Reinstall the filters. MS 290, MS 310, MS 390 41 Never use a brush...
Product Instruction Manual
Page 47
...area. : Dispose of non-resinous oil. : Place the new spring with retaining frame in position in position. The bits of the housing. STIHL BioPlus, completely fill the chain oil tank. : Store the unit in the fan housing might still be under tension and could fly apart ...carburetor diaphragms sticking together. : Remove the saw chain and guide bar, clean them out of spring in a dry and high or locked location, out of the reach of rope off the rotor. : Fit the fan housing. English / USA Storing the Machine : Take one turn of children and other unauthorized persons. 46 MS 290, MS...
...area. : Dispose of non-resinous oil. : Place the new spring with retaining frame in position in position. The bits of the housing. STIHL BioPlus, completely fill the chain oil tank. : Store the unit in the fan housing might still be under tension and could fly apart ...carburetor diaphragms sticking together. : Remove the saw chain and guide bar, clean them out of spring in a dry and high or locked location, out of the reach of rope off the rotor. : Fit the fan housing. English / USA Storing the Machine : Take one turn of children and other unauthorized persons. 46 MS 290, MS...
Product Instruction Manual
Page 54
... STIHL recommends that the following maintenance intervals apply for normal operating conditions only. chain must not rotate X X Readjust idle Spark plug Readjust electrode gap Replace after each refueling stop weekly monthly every 12 months if problem if damaged as required English / USA X X X X X X X MS 290, MS 310, MS... 390 53 If you only use the saw occasionally, extend the intervals accordingly. Carburetor Check idle adjustment -
... STIHL recommends that the following maintenance intervals apply for normal operating conditions only. chain must not rotate X X Readjust idle Spark plug Readjust electrode gap Replace after each refueling stop weekly monthly every 12 months if problem if damaged as required English / USA X X X X X X X MS 290, MS 310, MS... 390 53 If you only use the saw occasionally, extend the intervals accordingly. Carburetor Check idle adjustment -
Product Instruction Manual
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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
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... 22. Rear Handle. For fine tuning the carburetor. 3. Chain Brake. Starter Grip. Clutch. Chain Sprocket. Chain Catcher. Muffler. Front Handle (handlebar). Controls the speed of chain tension. 8. MS 290, MS 310, MS 390 55 Bumper Spike. Decompression valve. Throttle Trigger.... Rear Hand Guard. English / USA Definitions 1. Fuel Filler Cap. Guide Bar Nose. Carburetor Adjusting Screws. Chain Sprocket Cover. Covers the clutch...
... 22. Rear Handle. For fine tuning the carburetor. 3. Chain Brake. Starter Grip. Clutch. Chain Sprocket. Chain Catcher. Muffler. Front Handle (handlebar). Controls the speed of chain tension. 8. MS 290, MS 310, MS 390 55 Bumper Spike. Decompression valve. Throttle Trigger.... Rear Hand Guard. English / USA Definitions 1. Fuel Filler Cap. Guide Bar Nose. Carburetor Adjusting Screws. Chain Sprocket Cover. Covers the clutch...
Product Instruction Manual
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... has been shown to on the CARB Air Index Label indicates the terms: Extended = 300 hours Intermediate = 125 hours Moderate = 50 hours STIHL single cylinder two-stroke engine MS 290 Displacement Bore Stroke Idle speed 3.45 cu.in (56,5 cm3) 1.81 in (46 mm) 1.34 in (34 mm) 2,800 rpm...) 2,800 rpm MS 390 Displacement Bore Stroke Idle speed 3.90 cu.in (64,1 cm3) 1.93 in (49 mm) 1.34 in (34 mm) 2,800 rpm Magneto Ignition System Electronic (breakerless) Spark plug (suppressed) Bosch WSR 6 F, NGK BPMR 7 A, Electrode gap 0.02 in (0.5 mm) Fuel / Oil System Diaphragm carburetor All position with ...
... has been shown to on the CARB Air Index Label indicates the terms: Extended = 300 hours Intermediate = 125 hours Moderate = 50 hours STIHL single cylinder two-stroke engine MS 290 Displacement Bore Stroke Idle speed 3.45 cu.in (56,5 cm3) 1.81 in (46 mm) 1.34 in (34 mm) 2,800 rpm...) 2,800 rpm MS 390 Displacement Bore Stroke Idle speed 3.90 cu.in (64,1 cm3) 1.93 in (49 mm) 1.34 in (34 mm) 2,800 rpm Magneto Ignition System Electronic (breakerless) Spark plug (suppressed) Bosch WSR 6 F, NGK BPMR 7 A, Electrode gap 0.02 in (0.5 mm) Fuel / Oil System Diaphragm carburetor All position with ...
Product Instruction Manual
Page 60
...equipment engines must be free from defects in materials and workmanship which cause the engine to fail to a STIHL service center as soon as the carburetor and the ignition system. The equipment engine must warrant the emission control system on your engine is defective,... engine use from defects in your small off -road equipment engine. In the U.S. EPA standards for two years. MS 290, MS 310, MS 390 59 STIHL Incorporated recommends that STIHL Incorporated may be aware, however, that you are responsible for small non road engines. EPA regulations for presenting your...
...equipment engines must be free from defects in materials and workmanship which cause the engine to fail to a STIHL service center as soon as the carburetor and the ignition system. The equipment engine must warrant the emission control system on your engine is defective,... engine use from defects in your small off -road equipment engine. In the U.S. EPA standards for two years. MS 290, MS 310, MS 390 59 STIHL Incorporated recommends that STIHL Incorporated may be aware, however, that you are responsible for small non road engines. EPA regulations for presenting your...
Product Instruction Manual
Page 61
...labor which is scheduled only for regular inspection to the effect of the following list specifically defines the emission-related warranted parts: Carburetor Choke (Cold start enrichment system) Intake manifold Air filter Spark plug Magneto or electronic ignition system (ignition module) Catalytic converter ...Control Systems Warranty shall not cover any of "repair or replace as non-defective, STIHL Incorporated will be performed at and after the first scheduled replacement point. 60 MS 290, MS 310, MS 390 English / USA If any emission related part on emission-related parts and must ...
...labor which is scheduled only for regular inspection to the effect of the following list specifically defines the emission-related warranted parts: Carburetor Choke (Cold start enrichment system) Intake manifold Air filter Spark plug Magneto or electronic ignition system (ignition module) Catalytic converter ...Control Systems Warranty shall not cover any of "repair or replace as non-defective, STIHL Incorporated will be performed at and after the first scheduled replacement point. 60 MS 290, MS 310, MS 390 English / USA If any emission related part on emission-related parts and must ...