Stihl MS170/MS180 Chain Saw OEM Service & Repair Manual

© STIHL Inc., Virginia Beach, VA 2013 Setup and Service Procedures for the MS 170, MS 180 Chain Saw © STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Introduction  The MS 170, MS 180 chain saw has a 2-cycle engine  STIHL assigns a 4 digit series number to every product  The MS 170, MS 180 is assigned the 1130 series number  The 1130 series of saw was introduced to the market in 1995 as an 017, and then in 1998 the 018 was added  In 2002 the model designation changed from 017 to MS 170, and 018 to MS 180 1

© STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Specifications  Engine Displacement 30.1 cc (1.8 cu.in) 31.8 cc(1.9 cu. in.)  Engine Power 1.3 kW (1.7bhp) 1.5kW (2.0 bhp)  Weight 3.9 kg (8.6 lbs) 4.0 kg (8.8 lbs.)  Fuel Capacity 250 cc (8.5 oz.)  Chain Oil Capacity 145 cc (4.9 oz.)  Recommended OILOMATIC® Chain 3/8” PMM3  Guide Bar Lengths Available 12” to 16”  Engine Idle Speed 2800 RPM  Wide Open Throttle 14,000 RPM (with bar and chain installed) MS 170 MS 180 © STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Become Familiar With the Controls Master Control Lever™ A single lever operating the choke, throttle lock and on-off switch 0 = Off I = Ignition on Warm Start Cold Start 2

© STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Starting Features The MS 170 is equipped with a standard starter mechanism, and with 2 bar nuts holding the bar in place The MS 180 C-B has the Toolless Quick Chain Adjuster (QCA) for fast and easy chain and bar install and adjustment The MS 180 C-BE also has the Easy2Start™ starter mechanism which allows starting with less effort at a lower cranking speed © STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Starting Features The MS 180 C-B has the standard starter mechanism, which requires a brisk pull on the rope to it’s full extension to start the engine The MS 180 C-BE has the Easy2Start™ starter mechanism, which allows starting by simply pulling out the rope slow and easy, winding the auxiliary spring which then spins the motor over to start it Notice that the MS 180 C-BE has a deeper recoil housing and the handle extends out slightly farther for clearance 3

© STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Kickback!!! Kickback occurs when the moving saw chain near the upper quadrant of the bar nose contacts a solid object or is pinched The greater the force of the kickback reaction, the more difficult it becomes for the operator to control the saw © STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Chain and Bar Color Code Marking  STIHL saw chain will have a green or yellow tie strap to indicate if the chain is low-kickback or other than low-kickback  The bar will have two green or yellow dots on the powerhead end of the bar to identify if the bar is a reduced kickback bar or not 4

© STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Install the Bar and Chain  STIHL recommends the use of reduced kickback bars and low kickback chains on all STIHL chain saws  Yellow bar and chain combinations are for trained professionals with extraordinary cutting needs  Be sure the bar and chain are within the recommended length for the model of saw being assembled  Always wear gloves when handling saw chain to protect your hands from the sharp cutters © STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Install Bar & Chain: Quick Chain Adjuster  Install the tensioning gear and fasten the screw securely  The bar can be installed with the STIHL logo facing up or down; periodically the bar should be flipped to spread the wear over both edges of the bar 5

© STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Install Bar & Chain  Make sure the cutters on top of the bar are facing away from the powerhead! WRONG CORRECT WRONG © STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Quick Chain Adjuster (QCA)  The QCA allows the user to adjust the chain tension without tools Loosen the wing nut Rotate the adjusting wheel Tighten the wing nut 6

© STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Install Bar & Chain  If the saw does not have a QCA simply remove the 2 bar nuts, install the bar and chain, making sure the adjusting pin is in the hole in the bar © STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Install Bar & Chain  Install the cover and the 2 nuts leaving them just snug against the cover 7

© STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Chain Adjustment The 1130 saws have a front chain tensioner Most STIHL chain saws have a side chain tensioner that is more convenient to use Saws come with a combination wrench, commonly referred to as a “Scrench”, to make bar and chain service easy to do © STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Install Bar & Chain  Adjust the chain tension with the “Scrench” by holding up on the nose of the bar, tightening the chain tension screw, then tightening the nuts 8

© STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Correct Chain Tension  With the chain brake disengaged, pull the chain through from the top side and it should rotate freely without any slack appearing  If the chain goes from tight to loose the sprocket and chain may not be of the same pitch, or the sprocket and chain may have excessive wear and no longer have the same pitch © STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Correct Chain Tension  Regardless of bar length, check for correct chain tension by pulling up on the chain at the center of the bar  The tension is correct when the bottom of the drive link will just clear the bar groove 9

© STIHL Inc., Virginia Beach, VA 2013 US/STR confidential Cutterless Chain for Service  For any chain saw, to properly tune the carb or verify running RPM at idle and wide open throttle a bar and chain should be installed  Cutterless chains are available to provide a safe way for the service technician to do this without fear of the chain coming into contact with anything © STIHL Inc., Virginia Beach, VA 2013 US/STR confidential All Current Models of STIHL Chain Saws are Equipped with the STIHL Quickstop® Chain Braking System The chain is stopped and locked when the hand guard is pushed toward the guide bar nose by the left hand – or when the brake is activated by enough inertia in certain kickback situations Brake Band Engaged Brake Band Disengaged Chain Brake 10

Stihl MS170/MS180 Chain Saw OEM Service & Repair Manual

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