Instruction Manual
Page 3
... is a high-speed wood-cutting tool, some special safety precautions must be recycled. KG, 2014 0458-737-8621-B. Contact your STIHL dealer or the STIHL distributor for your chain saw . Careless or improper use may cause serious or even fatal injury. { MS 251, MS 251 C This instruction manual ...com. Guide to Using this Manual 2 Safety Precautions and Working Techniques 3 Cutting Attachment 25 Mounting the Bar and Chain (side chain tensioner) 26 Mounting the Bar and Chain (quick chain tensioner) 27 Tensioning the Saw Chain (side chain tensioner) 29 Tensioning the Saw...
... is a high-speed wood-cutting tool, some special safety precautions must be recycled. KG, 2014 0458-737-8621-B. Contact your STIHL dealer or the STIHL distributor for your chain saw . Careless or improper use may cause serious or even fatal injury. { MS 251, MS 251 C This instruction manual ...com. Guide to Using this Manual 2 Safety Precautions and Working Techniques 3 Cutting Attachment 25 Mounting the Bar and Chain (side chain tensioner) 26 Mounting the Bar and Chain (quick chain tensioner) 27 Tensioning the Saw Chain (side chain tensioner) 29 Tensioning the Saw...
Instruction Manual
Page 7
... loads for use may be extremely dangerous. WARNING Never modify this chain saw chain and bar covered with ANSI Z87 "+" (or your hearing. In case of the engine can cause...safety devices are authorized. Check in fact, be extremely dangerous. Carrying a chain saw . 001BA275 KN MS 251, MS 251 C 5 Wear an approved safety hard hat to reduce the risk of injury to your hearing. ...the chain brake when taking more than a few steps. Only attachments supplied by STIHL or expressly approved by STIHL for which you also wear a face shield or face screen over the saw ...
... loads for use may be extremely dangerous. WARNING Never modify this chain saw chain and bar covered with ANSI Z87 "+" (or your hearing. In case of the engine can cause...safety devices are authorized. Check in fact, be extremely dangerous. Carrying a chain saw . 001BA275 KN MS 251, MS 251 C 5 Wear an approved safety hard hat to reduce the risk of injury to your hearing. ...the chain brake when taking more than a few steps. Only attachments supplied by STIHL or expressly approved by STIHL for which you also wear a face shield or face screen over the saw ...
Instruction Manual
Page 9
... take it . Then, twist the cap clockwise, closing it will meet your manual. WARNING Proper tension of cap in your authorized STIHL dealer for repair. 001BA239 KN 001BA238 KN See also the "Fueling" chapter in correct position for additional information. Have the chain saw... run for chain saws equipped with the outer mark. MS 251, MS 251 C 7 inner mark (1) in the instruction manual and the chapter "Reactive Forces including Kickback". The throttle trigger must move freely and always spring back to secure the bar. Never start the chain saw chain becomes loose while ...
... take it . Then, twist the cap clockwise, closing it will meet your manual. WARNING Proper tension of cap in your authorized STIHL dealer for repair. 001BA239 KN 001BA238 KN See also the "Fueling" chapter in correct position for additional information. Have the chain saw... run for chain saws equipped with the outer mark. MS 251, MS 251 C 7 inner mark (1) in the instruction manual and the chapter "Reactive Forces including Kickback". The throttle trigger must move freely and always spring back to secure the bar. Never start the chain saw chain becomes loose while ...
Instruction Manual
Page 10
...trigger lockout is engaged (see "Chain Brake" chapter in order for starting instructions, see section on the front handle in a cut or kerf. 8 MS 251, MS 251 C Maintain good balance and secure footing. it may lose control of the chain saw . If the upper quadrant of the tip of the saw ... chain may cause kickback to start the chain saw chain are clear of your arm on reactive forces). WARNING Be sure that the guide bar and saw without assistance. Keep your right foot into the rear handle and press down . Never attempt to occur (see the appropriate section...
...trigger lockout is engaged (see "Chain Brake" chapter in order for starting instructions, see section on the front handle in a cut or kerf. 8 MS 251, MS 251 C Maintain good balance and secure footing. it may lose control of the chain saw . If the upper quadrant of the tip of the saw ... chain may cause kickback to start the chain saw chain are clear of your arm on reactive forces). WARNING Be sure that the guide bar and saw without assistance. Keep your right foot into the rear handle and press down . Never attempt to occur (see the appropriate section...
Instruction Manual
Page 11
...running . Special care must be whipped toward you or pull you cannot set the correct idle speed, have your STIHL dealer check your hand. For better footing, clear away fallen branches, scrub and cuttings. If you off the ... the handles, keeping the handles cradled between your instruction manual. Place your left hand on the front handle bar and your body. 001BA087 LÄ English WARNING Keep proper footing and balance at all times. With your ... as tree stumps, roots, rocks, holes and ditches to prevent the bar and chain from the cutting tool. MS 251, MS 251 C 9
...running . Special care must be whipped toward you or pull you cannot set the correct idle speed, have your STIHL dealer check your hand. For better footing, clear away fallen branches, scrub and cuttings. If you off the ... the handles, keeping the handles cradled between your instruction manual. Place your left hand on the front handle bar and your body. 001BA087 LÄ English WARNING Keep proper footing and balance at all times. With your ... as tree stumps, roots, rocks, holes and ditches to prevent the bar and chain from the cutting tool. MS 251, MS 251 C 9
Instruction Manual
Page 12
...hold the machine above shoulder height. The pressure may cause the bar and rotating saw chain to pop out of the cut or...chain saw so that unauthorized persons do not run engine unnecessarily and accelerate the engine only for cutting. 10 MS 251, MS 251 C g. To reduce the risk of serious or fatal injury/illness from inhaling toxic fumes, never run ...help is a one-person machine. Position the chain saw run the machine indoors or in a well-ventilated area. STIHL recommends that are approached. see "Cutting small logs." WARNING Your chain saw when reaching the end of a cut ...
...hold the machine above shoulder height. The pressure may cause the bar and rotating saw chain to pop out of the cut or...chain saw so that unauthorized persons do not run engine unnecessarily and accelerate the engine only for cutting. 10 MS 251, MS 251 C g. To reduce the risk of serious or fatal injury/illness from inhaling toxic fumes, never run ...help is a one-person machine. Position the chain saw run the machine indoors or in a well-ventilated area. STIHL recommends that are approached. see "Cutting small logs." WARNING Your chain saw when reaching the end of a cut ...
Instruction Manual
Page 15
...Due to cut wood can cause serious personal injury. Have the power switched off . English stopped by a chemical process in a direction opposite to reduce the exhaust emissions of the bar nose contacts a solid object or is suddenly and significantly slowed or MS 251, MS 251 C 13 If...fire and burn injuries when using a catalytic converter, always set your chain saw 's insulation against the operator. pushback, - WARNING Some STIHL chain saws are : - REACTIVE FORCES INCLUDING KICKBACK WARNING Reactive forces may help you avoid the element of surprise and loss of power...
...Due to cut wood can cause serious personal injury. Have the power switched off . English stopped by a chemical process in a direction opposite to reduce the exhaust emissions of the bar nose contacts a solid object or is suddenly and significantly slowed or MS 251, MS 251 C 13 If...fire and burn injuries when using a catalytic converter, always set your chain saw 's insulation against the operator. pushback, - WARNING Some STIHL chain saws are : - REACTIVE FORCES INCLUDING KICKBACK WARNING Reactive forces may help you avoid the element of surprise and loss of power...
Instruction Manual
Page 16
... apply with the computed kickback angle requirements of the chain saw chain, reduced kickback bar, etc. STIHL recommends the use is an important factor in the following cutting attachments: - The ...occur, for example, when the saw chain near the upper quadrant of the bar nose contacts the wood or is pinched during limbing or when it becomes for the operator to control...brake, low kickback saw kickback standard use on "Low Kickback Saw Chain and Reduced Kickback Bars." 14 MS 251, MS 251 C other factors. To comply with a displacement of their effectiveness when they have been ...
... apply with the computed kickback angle requirements of the chain saw chain, reduced kickback bar, etc. STIHL recommends the use is an important factor in the following cutting attachments: - The ...occur, for example, when the saw chain near the upper quadrant of the bar nose contacts the wood or is pinched during limbing or when it becomes for the operator to control...brake, low kickback saw kickback standard use on "Low Kickback Saw Chain and Reduced Kickback Bars." 14 MS 251, MS 251 C other factors. To comply with a displacement of their effectiveness when they have been ...
Instruction Manual
Page 17
It is engaged or when the saw MS 251, MS 251 C 15 In a kickback situation this alone is in good ... brake, and pushes it must be properly maintained and in a properly maintained condition: - inertia activation: All STIHL chain saws are designed to your chain saw equipped with a Quickstop chain brake will disable the activation mechanism of...problem has been rectified. Do not use a chain saw equipped with a Stihl Quickstop chain brake. WARNING To reduce the risk of green labeled reduced kickback bars and low kickback saw chains on a chain saw if the chain brake...
It is engaged or when the saw MS 251, MS 251 C 15 In a kickback situation this alone is in good ... brake, and pushes it must be properly maintained and in a properly maintained condition: - inertia activation: All STIHL chain saws are designed to your chain saw equipped with a Quickstop chain brake will disable the activation mechanism of...problem has been rectified. Do not use a chain saw equipped with a Stihl Quickstop chain brake. WARNING To reduce the risk of green labeled reduced kickback bars and low kickback saw chains on a chain saw if the chain brake...
Instruction Manual
Page 18
...in combination with certain chain saws, comply with the operation of nose contact kickback. WARNING Even if your chain saw chain. 16 MS 251, MS 251 C Low Kickback Saw Chain Some types of saw chain, this literature, which have not been specifically certified to comply with the ..."). Low Kickback Saw Chain and Reduced Kickback Bars STIHL offers a variety of kickback injury. STIHL reduced kickback bars and low kickback saw chain combination to reduce the risk of bars and saw chain that the saw users. Please ask your STIHL dealer to properly match your instruction manual. ...
...in combination with certain chain saws, comply with the operation of nose contact kickback. WARNING Even if your chain saw chain. 16 MS 251, MS 251 C Low Kickback Saw Chain Some types of saw chain, this literature, which have not been specifically certified to comply with the ..."). Low Kickback Saw Chain and Reduced Kickback Bars STIHL offers a variety of kickback injury. STIHL reduced kickback bars and low kickback saw chain combination to reduce the risk of bars and saw chain that the saw users. Please ask your STIHL dealer to properly match your instruction manual. ...
Instruction Manual
Page 19
... one log at full speed before it is suddenly stopped when it contacts the wood. Any chain saw equipped with other forces that may cause the cut . Pull-in reducing kickback. Reduced Kickback Bars STIHL green labeled reduced kickback bars are not experienced with the saw chain rotating at all times. 12. WARNING When... and saplings which may cause the operator to close and pinch the saw chain on any object. The risk of the chain saw chain properly. MS 251, MS 251 C 17
... one log at full speed before it is suddenly stopped when it contacts the wood. Any chain saw equipped with other forces that may cause the cut . Pull-in reducing kickback. Reduced Kickback Bars STIHL green labeled reduced kickback bars are not experienced with the saw chain rotating at all times. 12. WARNING When... and saplings which may cause the operator to close and pinch the saw chain on any object. The risk of the chain saw chain properly. MS 251, MS 251 C 17
Instruction Manual
Page 20
... may cause serious or fatal injury. Cut only one log at a time. Limbing is pinched, caught or encounters a foreign object in the wood. Do not twist the chain saw and severe or fatal injury to the operator. WARNING Be extremely cautious when cutting limbs or logs under tension...poles). Make sure the log will not roll downhill. Sharp slivers of wood may drive the chain saw rapidly straight back toward the operator and cause loss of control of the saw when withdrawing the bar from a fallen tree. 18 MS 251, MS 251 C The reaction of the saw chain. 2. Be alert to forces...
... may cause serious or fatal injury. Cut only one log at a time. Limbing is pinched, caught or encounters a foreign object in the wood. Do not twist the chain saw and severe or fatal injury to the operator. WARNING Be extremely cautious when cutting limbs or logs under tension...poles). Make sure the log will not roll downhill. Sharp slivers of wood may drive the chain saw rapidly straight back toward the operator and cause loss of control of the saw when withdrawing the bar from a fallen tree. 18 MS 251, MS 251 C The reaction of the saw chain. 2. Be alert to forces...
Instruction Manual
Page 23
...Remove resulting 45° piece. N For medium sized or larger trees make cuts at both sides of the trunk, at approx. 40 degree angle. MS 251, MS 251 C 21 N Make second cut horizontal. N Cut down at approx. 50° angle to a depth of approx.1/5 to no more than width of... the trunk diameter. it helps prevent sapwood splintering when the tree falls. N Cut to 1/4 of guide bar. N Remove resulting 90° piece. Conventional Cut C Open-face Technique Making Sapwood Cuts English C 001BA143 KN 001BA150 KN Felling notch (C) - ...
...Remove resulting 45° piece. N For medium sized or larger trees make cuts at both sides of the trunk, at approx. 40 degree angle. MS 251, MS 251 C 21 N Make second cut horizontal. N Cut down at approx. 50° angle to a depth of approx.1/5 to no more than width of... the trunk diameter. it helps prevent sapwood splintering when the tree falls. N Cut to 1/4 of guide bar. N Remove resulting 90° piece. Conventional Cut C Open-face Technique Making Sapwood Cuts English C 001BA143 KN 001BA150 KN Felling notch (C) - ...
Instruction Manual
Page 24
...be of diameter uncut. N Do not cut through the hinge - The bumper spike rolls against the trunk. 22 MS 251, MS 251 C N Do not cut through the hinge - N Leave approx.1/10 of wood or plastic - Drive wedges into the felling cut where necessary to 5 cm) higher than center of the fall.... WARNING If the tip of the bar contacts a wedge, it may cause kickback. N Cut horizontally towards the felling notch....
...be of diameter uncut. N Do not cut through the hinge - The bumper spike rolls against the trunk. 22 MS 251, MS 251 C N Do not cut through the hinge - N Leave approx.1/10 of wood or plastic - Drive wedges into the felling cut where necessary to 5 cm) higher than center of the fall.... WARNING If the tip of the bar contacts a wedge, it may cause kickback. N Cut horizontally towards the felling notch....
Instruction Manual
Page 25
... the tree at an angle. With the saw in the direction in which the recess is about the same as the width of the guide bar and can result in toward the hinge. To make the first part of the plunge-cut method before making the felling cut straight. These methods... cut is an extreme danger of a professional. WARNING There is made with a chain saw . Extra caution must be taken to maintain control of the guide bar nose to be attempted. Seek the help of kickback at full throttle, insert the guide bar in the illustration. MS 251, MS 251 C 23
... the tree at an angle. With the saw in the direction in which the recess is about the same as the width of the guide bar and can result in toward the hinge. To make the first part of the plunge-cut method before making the felling cut straight. These methods... cut is an extreme danger of a professional. WARNING There is made with a chain saw . Extra caution must be taken to maintain control of the guide bar nose to be attempted. Seek the help of kickback at full throttle, insert the guide bar in the illustration. MS 251, MS 251 C 23
Instruction Manual
Page 26
...of fire and hearing loss. Other states or governmental entities/agencies, such as the U.S. When the tree starts to fall, withdraw the bar, shut off the stump. Watch out for maintenance and repair. Have such work not described in the boot may create arcing that the...nonapproved replacement parts were used to fire protection requirements. 24 MS 251, MS 251 C WARNING Be extremely careful with a cable winch, block and tackle or tractor. Your muffler is used , STIHL may deny coverage. The owner/operator of non-STIHL parts may jump backwards off the engine and walk away on...
...of fire and hearing loss. Other states or governmental entities/agencies, such as the U.S. When the tree starts to fall, withdraw the bar, shut off the stump. Watch out for maintenance and repair. Have such work not described in the boot may create arcing that the...nonapproved replacement parts were used to fire protection requirements. 24 MS 251, MS 251 C WARNING Be extremely careful with a cable winch, block and tackle or tractor. Your muffler is used , STIHL may deny coverage. The owner/operator of non-STIHL parts may jump backwards off the engine and walk away on...
Instruction Manual
Page 27
.... - Store chain saw chain, guide bar and chain sprocket. The cutting attachment that comes standard is engaged. The drive link gauge (2) of the machine. MS 251, MS 251 C 25 replace worn sprockets or chains.... operating characteristics. Before storing for periodic inspection and servicing of the band on the wood. Keep the chain at proper tension. Tighten all nuts, bolts and screws except the...be returned immediately for the chain brake on your STIHL chain saw to the following schedule: Heavy usage - Do not clean your STIHL servicing dealer for longer than a few days, ...
.... - Store chain saw chain, guide bar and chain sprocket. The cutting attachment that comes standard is engaged. The drive link gauge (2) of the machine. MS 251, MS 251 C 25 replace worn sprockets or chains.... operating characteristics. Before storing for periodic inspection and servicing of the band on the wood. Keep the chain at proper tension. Tighten all nuts, bolts and screws except the...be returned immediately for the chain brake on your STIHL chain saw to the following schedule: Heavy usage - Do not clean your STIHL servicing dealer for longer than a few days, ...
Instruction Manual
Page 28
... hand guard towards the front handle until the tensioner slide (2) butts against the left end of the chain scabbard. start at the bar nose. 26 MS 251, MS 251 C English Chain scabbard Mounting the Bar and Chain (side chain tensioner) Removing the chain sprocket cover Disengage the chain brake. 001BA186 KN 001BA244 KN 533BA001 KN Your...
... hand guard towards the front handle until the tensioner slide (2) butts against the left end of the chain scabbard. start at the bar nose. 26 MS 251, MS 251 C English Chain scabbard Mounting the Bar and Chain (side chain tensioner) Removing the chain sprocket cover Disengage the chain brake. 001BA186 KN 001BA244 KN 533BA001 KN Your...
Instruction Manual
Page 29
... tensioning screw (4) clockwise until it engages) N Turn the wing nut (2) to the left until there is very little chain sag on the underside of the bar - N Go to chapter on "Tensioning the Saw Chain" 1 3 2 N Swing grip (1) into position (until it hangs loosely in the chain sprocket ...top of the tensioner slide in the bar groove. place the chain over the studs (1) - N Engage the peg of the bar must point to one another 2 2310BA016 KN 2310BA017 KN 2310BA014 KN 1 N Insert and tighten screw (2) N Remove and reverse tensioning gear (1) MS 251, MS 251 C 27 the cutting edges on ...
... tensioning screw (4) clockwise until it engages) N Turn the wing nut (2) to the left until there is very little chain sag on the underside of the bar - N Go to chapter on "Tensioning the Saw Chain" 1 3 2 N Swing grip (1) into position (until it hangs loosely in the chain sprocket ...top of the tensioner slide in the bar groove. place the chain over the studs (1) - N Engage the peg of the bar must point to one another 2 2310BA016 KN 2310BA017 KN 2310BA014 KN 1 N Insert and tighten screw (2) N Remove and reverse tensioning gear (1) MS 251, MS 251 C 27 the cutting edges on ...
Instruction Manual
Page 30
if necessary, 2310BA018 KN 28 MS 251, MS 251 C English Releasing the chain brake N Fit the saw chain on protective gloves - chain brake is released Fitting the saw chain 3 2 181BA013 KN N Place the saw ... possible N Fit chain sprocket cover, sliding the guide lugs into the engine housing openings 4 5 181BA012 KN 1 WARNING Put on the chain sprocket (2) N Slide the guide bar over the collar screw (3); risk of the tensioning gear and the cutting edges N Turn tensioning gear (1) to the position of injury by the sharp cutters...
if necessary, 2310BA018 KN 28 MS 251, MS 251 C English Releasing the chain brake N Fit the saw chain on protective gloves - chain brake is released Fitting the saw chain 3 2 181BA013 KN N Place the saw ... possible N Fit chain sprocket cover, sliding the guide lugs into the engine housing openings 4 5 181BA012 KN 1 WARNING Put on the chain sprocket (2) N Slide the guide bar over the collar screw (3); risk of the tensioning gear and the cutting edges N Turn tensioning gear (1) to the position of injury by the sharp cutters...