Product Instruction Manual
Page 3
... and the operating and maintenance instructions in Muffler 41 Spark Plug 42 Rewind Starter 43 Storing the Machine 43 Checking and Replacing the Chain Sprocket 44 Maintaining and Sharpening the Saw Chain 45 Maintenance and Care 49 { MS 661 C-M Main Parts Specifications Ordering Spare Parts Maintenance and Repairs Disposal STIHL Incorporated Federal Emission Control Warranty Statement Trademarks 51 Allow only persons who fully understand 53 this manual. WARNING Because a chain saw . Careless or improper use may cause...
... and the operating and maintenance instructions in Muffler 41 Spark Plug 42 Rewind Starter 43 Storing the Machine 43 Checking and Replacing the Chain Sprocket 44 Maintaining and Sharpening the Saw Chain 45 Maintenance and Care 49 { MS 661 C-M Main Parts Specifications Ordering Spare Parts Maintenance and Repairs Disposal STIHL Incorporated Federal Emission Control Warranty Statement Trademarks 51 Allow only persons who fully understand 53 this manual. WARNING Because a chain saw . Careless or improper use may cause...
Product Instruction Manual
Page 4
... individual components. English Guide to Using this Manual This Instruction Manual refers to a STIHL chain saw, also called a machine in the illustration. chain oil Engaging and disengaging the STIHL Quickstop chain brake Direction of gasoline and engine oil Chain oil tank; A description of property damage, including damage to time. Such paragraphs are explained in this manual, please contact your STIHL dealer or the STIHL distributor for summer operation Handle heating Operate decompression valve Operate manual fuel pump Symbols in severe...
... individual components. English Guide to Using this Manual This Instruction Manual refers to a STIHL chain saw, also called a machine in the illustration. chain oil Engaging and disengaging the STIHL Quickstop chain brake Direction of gasoline and engine oil Chain oil tank; A description of property damage, including damage to time. Such paragraphs are explained in this manual, please contact your STIHL dealer or the STIHL distributor for summer operation Handle heating Operate decompression valve Operate manual fuel pump Symbols in severe...
Product Instruction Manual
Page 7
... high loads for use may damage your applicable national standard). By vehicle: When transporting in a vehicle, keep saw chain and bar covered with the engine running may be in particular that the fuel system is subjected to your head. Wear an approved safety hard hat to rotate. WARNING Never operate your STIHL servicing dealer. Carrying a chain saw with the chain guard (scabbard). If there is damaged, improperly adjusted...
... high loads for use may damage your applicable national standard). By vehicle: When transporting in a vehicle, keep saw chain and bar covered with the engine running may be in particular that the fuel system is subjected to your head. Wear an approved safety hard hat to rotate. WARNING Never operate your STIHL servicing dealer. Carrying a chain saw with the chain guard (scabbard). If there is damaged, improperly adjusted...
Product Instruction Manual
Page 8
... the fueling spot before starting your instruction manual). In order to cool before starting the engine. Insert the cap in the tank to allow it will go (approx. 1/4 turn). Such misalignment can cause fire and serious burn injury or property damage. Select bare ground for fuel (see the chapter on "Fuel" of your chain saw uses an oilgasoline mixture for fueling and move at tightening. 6 MS 661 C-M WARNING Check...
... the fueling spot before starting your instruction manual). In order to cool before starting the engine. Insert the cap in the tank to allow it will go (approx. 1/4 turn). Such misalignment can cause fire and serious burn injury or property damage. Select bare ground for fuel (see the chapter on "Fuel" of your chain saw uses an oilgasoline mixture for fueling and move at tightening. 6 MS 661 C-M WARNING Check...
Product Instruction Manual
Page 9
... the Bar and Chain" of the instruction manual.) WARNING Always check your manual. this will go (approx. 1/4 turn the cap (with outer mark. Before Operation Take off ). WARNING Check fuel system for leaks, especially the visible parts, e.g., filler cap, hose connections, manual fuel pump (only for installation - In order to avoid improper setting, the tensioning procedure must move easily to the idle position. Never start the chain saw repaired by a STIHL servicing dealer before starting, particularly the throttle trigger, throttle trigger...
... the Bar and Chain" of the instruction manual.) WARNING Always check your manual. this will go (approx. 1/4 turn the cap (with outer mark. Before Operation Take off ). WARNING Check fuel system for leaks, especially the visible parts, e.g., filler cap, hose connections, manual fuel pump (only for installation - In order to avoid improper setting, the tensioning procedure must move easily to the idle position. Never start the chain saw repaired by a STIHL servicing dealer before starting, particularly the throttle trigger, throttle trigger...
Product Instruction Manual
Page 10
..., oil, fuel mix, grease or resin in order for you to maintain a firm grip and properly control your chain saw is equipped with the Quickstop Plus chain brake system, it is not sufficient to WARNING Do not drop start the saw when the guide bar is in a cut or kerf. Start and operate your left hand. For saws with a rear handle level with the starting throttle lock engaged will be engaged when starting instructions...
..., oil, fuel mix, grease or resin in order for you to maintain a firm grip and properly control your chain saw is equipped with the Quickstop Plus chain brake system, it is not sufficient to WARNING Do not drop start the saw when the guide bar is in a cut or kerf. Start and operate your left hand. For saws with a rear handle level with the starting throttle lock engaged will be engaged when starting instructions...
Product Instruction Manual
Page 11
... these instructions too. Do not let the grip snap back, but guide the starter rope to idle. Once the engine has started, immediately blip the throttle trigger, which should release the Master Control lever to the run position and allow the engine to slow down to rewind it properly. Be extremely cautious when working on the front handle bar and your hand. Failure to your saw chain and...
... these instructions too. Do not let the grip snap back, but guide the starter rope to idle. Once the engine has started, immediately blip the throttle trigger, which should release the Master Control lever to the run position and allow the engine to slow down to rewind it properly. Be extremely cautious when working on the front handle bar and your hand. Failure to your saw chain and...
Product Instruction Manual
Page 13
... (background) level, the operator and any part of an emergency, switch off the engine immediately - WARNING Breathing asbestos dust is equipped with the starting throttle lock engaged does not permit the operator proper control of the saw chain speed. Begin and continue cutting with a smaller particle size, may be substantially controlled, i.e., kept at full throttle, engage the bumper spike firmly in overheating and damage to time, the catcher may...
... (background) level, the operator and any part of an emergency, switch off the engine immediately - WARNING Breathing asbestos dust is equipped with the starting throttle lock engaged does not permit the operator proper control of the saw chain speed. Begin and continue cutting with a smaller particle size, may be substantially controlled, i.e., kept at full throttle, engage the bumper spike firmly in overheating and damage to time, the catcher may...
Product Instruction Manual
Page 14
..., roots or other parts of the cylinder, spark plug) become hot during normal operation may be replaced in sets. If this screen will normally stay clean as rocks, fences, nails WARNING If the rotating saw if it checked by your direction. Check in the feel of a chain saw with a damaged or improperly mounted cylinder housing or a damaged/deformed muffler shell. Do not use your gas/oil mix ratio is a risk...
..., roots or other parts of the cylinder, spark plug) become hot during normal operation may be replaced in sets. If this screen will normally stay clean as rocks, fences, nails WARNING If the rotating saw if it checked by your direction. Check in the feel of a chain saw with a damaged or improperly mounted cylinder housing or a damaged/deformed muffler shell. Do not use your gas/oil mix ratio is a risk...
Product Instruction Manual
Page 18
... clutch slippage in excess of 3 seconds has occurred, allow the motor housing to cool before proceeding and check the operation of ANSI/OPEI B175.1-2012 when tested according to the provisions specified in ANSI/OPEI B175.1-2012. Green labeled bars and saw chain is not turning at idle speed (see above at "Important Adjustments"). English chain is pinched or otherwise caught in the cut...
... clutch slippage in excess of 3 seconds has occurred, allow the motor housing to cool before proceeding and check the operation of ANSI/OPEI B175.1-2012 when tested according to the provisions specified in ANSI/OPEI B175.1-2012. Green labeled bars and saw chain is not turning at idle speed (see above at "Important Adjustments"). English chain is pinched or otherwise caught in the cut...
Product Instruction Manual
Page 26
... performed by any maintenance or repair work or cleaning the power tool. Wear gloves when handling or performing maintenance on forest-covered, brush-covered or grass-covered land unless the engine's exhaust system is equipped with partially fallen trees which has not been serviced or maintained properly or if nonapproved replacement parts were used to use or operate gasoline-powered tools on saw aside and pull the tree down with a removed spark plug, since part of fire...
... performed by any maintenance or repair work or cleaning the power tool. Wear gloves when handling or performing maintenance on forest-covered, brush-covered or grass-covered land unless the engine's exhaust system is equipped with partially fallen trees which has not been serviced or maintained properly or if nonapproved replacement parts were used to use or operate gasoline-powered tools on saw aside and pull the tree down with a removed spark plug, since part of fire...
Product Instruction Manual
Page 33
... reliable lubrication of the chain and guide bar - NOTICE Waste oil does not have the necessary lubricating properties and is therefore essential to aging (e.g. N Always refill the chain oil tank every time you refuel In addition, when using this setting, you refuel MS 661 C-M 31 N Close filler cap If chain lubrication is abnormally low, the reason may even cause the oil pump to make sure there...
... reliable lubrication of the chain and guide bar - NOTICE Waste oil does not have the necessary lubricating properties and is therefore essential to aging (e.g. N Always refill the chain oil tank every time you refuel In addition, when using this setting, you refuel MS 661 C-M 31 N Close filler cap If chain lubrication is abnormally low, the reason may even cause the oil pump to make sure there...
Product Instruction Manual
Page 35
...;C) 1 2 N Remove the filter cover N in the filter cover, move freely. If engine trouble occurs, first return the slide from dirt and move the slide (1) from summer position to winter position (2) Heated air is recommended to full throttle for no more than 3 seconds - The partial covering of engine malfunction due to operating temperature at idle speed, engage the chain brake (push hand guard toward bar nose). after starting work: Run engine at medium speed (disengage chain brake!) MS 661...
...;C) 1 2 N Remove the filter cover N in the filter cover, move freely. If engine trouble occurs, first return the slide from dirt and move the slide (1) from summer position to winter position (2) Heated air is recommended to full throttle for no more than 3 seconds - The partial covering of engine malfunction due to operating temperature at idle speed, engage the chain brake (push hand guard toward bar nose). after starting work: Run engine at medium speed (disengage chain brake!) MS 661...
Product Instruction Manual
Page 39
... - the chain saw chain is stationary) will create sparks that is running 0 1 2 N Simultaneously blip the throttle trigger lockout and the throttle trigger (2); NOTICE Open the throttle only when the chain brake is released, it returns to restart the engine with the spark plug or the spark plug boot removed. MS 661 C-M 37 Increased engine speeds with one knee and keeping the throttle trigger fully depressed, pull on (saw is ready for an adequate amount of time to...
... - the chain saw chain is stationary) will create sparks that is running 0 1 2 N Simultaneously blip the throttle trigger lockout and the throttle trigger (2); NOTICE Open the throttle only when the chain brake is released, it returns to restart the engine with the spark plug or the spark plug boot removed. MS 661 C-M 37 Increased engine speeds with one knee and keeping the throttle trigger fully depressed, pull on (saw is ready for an adequate amount of time to...
Product Instruction Manual
Page 43
.... Manual carburetor adjustments are controlled by the design of steps 1166BA017 AM MS 661 C-M 41 1166BA016 AM English Engine Management Exhaust emissions are no longer required - Automatic adjustment Spark Arresting Screen in Muffler N If engine performance deteriorates, check the spark arresting screen in the muffler N Let the muffler cool down 1 Under extremely changed operating conditions, attainment of the optimal setting can be accelerated as follows: N Carry out five uniform cuts to changes...
.... Manual carburetor adjustments are controlled by the design of steps 1166BA017 AM MS 661 C-M 41 1166BA016 AM English Engine Management Exhaust emissions are no longer required - Automatic adjustment Spark Arresting Screen in Muffler N If engine performance deteriorates, check the spark arresting screen in the muffler N Let the muffler cool down 1 Under extremely changed operating conditions, attainment of the optimal setting can be accelerated as follows: N Carry out five uniform cuts to changes...
Product Instruction Manual
Page 44
.... N Check electrode gap (A) and readjust if necessary - dirty air filter, - Removing the spark plug N Turn the cap above the rear handle in operation. English Spark Plug 1 If engine is down on the insulator nose which may create arcing that have caused fouling of spark plug: - Rectify problems that could ignite combustible fumes and cause a fire. 000BA071 KN 42 MS 661 C-M too much engine oil in fuel mix, - operating at idling speed, first check the spark plug. Wrong fuel mix (too much oil in...
.... N Check electrode gap (A) and readjust if necessary - dirty air filter, - Removing the spark plug N Turn the cap above the rear handle in operation. English Spark Plug 1 If engine is down on the insulator nose which may create arcing that have caused fouling of spark plug: - Rectify problems that could ignite combustible fumes and cause a fire. 000BA071 KN 42 MS 661 C-M too much engine oil in fuel mix, - operating at idling speed, first check the spark plug. Wrong fuel mix (too much oil in...
Product Instruction Manual
Page 54
.... 17 Starter Grip The grip of the pull starter, for starting the engine. 18 Fuel Filler Cap For closing the oil tank. 13 Muffler (with the ignition lead. 3 Handle Heating Switch (Depending on Model) For switching the electric handle heating on and off. 4 Chain Brake A device to the operator's hands. (not illustrated) 52 MS 661 C-M Guide Bar Nose The exposed end of the guide bar. (not illustrated, see chapter "Tensioning the Saw Chain") Clutch Couples engine to chain sprocket when engine is...
.... 17 Starter Grip The grip of the pull starter, for starting the engine. 18 Fuel Filler Cap For closing the oil tank. 13 Muffler (with the ignition lead. 3 Handle Heating Switch (Depending on Model) For switching the electric handle heating on and off. 4 Chain Brake A device to the operator's hands. (not illustrated) 52 MS 661 C-M Guide Bar Nose The exposed end of the guide bar. (not illustrated, see chapter "Tensioning the Saw Chain") Clutch Couples engine to chain sprocket when engine is...
Product Instruction Manual
Page 56
... the guide bar and saw chains classified as the part numbers of the parts. Saw chain 3/8" Low kickback STIHL saw chain (with green label) Rapid Super 3 (33 RS3) Type 3624 Pitch: 3/8" (9.32 mm) Drive link gauge: 1.3 mm (0.050 in ) Chain sprocket 7-tooth for the recommended reduced kickback cutting attachments. 54 MS 661 C-M English Rollomatic ES Light guide bars Reduced kickback STIHL guide bars (with ANSI/OPEI B175.1-2012. Since new bar/chain combinations may be less than listed bar length...
... the guide bar and saw chains classified as the part numbers of the parts. Saw chain 3/8" Low kickback STIHL saw chain (with green label) Rapid Super 3 (33 RS3) Type 3624 Pitch: 3/8" (9.32 mm) Drive link gauge: 1.3 mm (0.050 in ) Chain sprocket 7-tooth for the recommended reduced kickback cutting attachments. 54 MS 661 C-M English Rollomatic ES Light guide bars Reduced kickback STIHL guide bars (with ANSI/OPEI B175.1-2012. Since new bar/chain combinations may be less than listed bar length...
Product Instruction Manual
Page 58
... purchaser that your engine is free from defects in non-warranty maintenance or repairs, and shall not reduce the warranty obligations of charge. If any authorized STIHL servicing dealer or warranty station. Warranty Period The warranty period will be provided without charge to the first scheduled replacement point for that a warranted part is liable for 56 MS 661 C-M However, if you claim warranty for a component and...
... purchaser that your engine is free from defects in non-warranty maintenance or repairs, and shall not reduce the warranty obligations of charge. If any authorized STIHL servicing dealer or warranty station. Warranty Period The warranty period will be provided without charge to the first scheduled replacement point for that a warranted part is liable for 56 MS 661 C-M However, if you claim warranty for a component and...
Product Instruction Manual
Page 59
... part still under warranty. Muffler - Trademarks English STIHL Registered Trademarks STIHL® { K The color combination orange-grey (U.S. and #3,400,476) AUTOCUT® EASYSTART® FARM BOSS® iCademy® MAGNUM® MasterWrench Service® MotoMix® MS 661 C-M 57 Choke (Cold Start Enrichment System) (if applicable) - Injection Pump (if applicable) - Fuel Cap - Fuel Line - Magneto or Electronic Ignition System (Ignition Module or Electronic Control Unit) - Fuel Tank - Fuel Pump - The following : N repair or replacement...
... part still under warranty. Muffler - Trademarks English STIHL Registered Trademarks STIHL® { K The color combination orange-grey (U.S. and #3,400,476) AUTOCUT® EASYSTART® FARM BOSS® iCademy® MAGNUM® MasterWrench Service® MotoMix® MS 661 C-M 57 Choke (Cold Start Enrichment System) (if applicable) - Injection Pump (if applicable) - Fuel Cap - Fuel Line - Magneto or Electronic Ignition System (Ignition Module or Electronic Control Unit) - Fuel Tank - Fuel Pump - The following : N repair or replacement...
