Stihl MS 18 Servise Manual
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Stihl MS 18 Servise Manual

Chain saw
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Setup and Service Procedures for the
MS 170, MS 180 Chain Saw
© STIHL Inc., Virginia Beach, VA
2013
Introduction
confidential
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
© STIHL Inc., Virginia Beach, VA
2013
US/STR
1

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  • Page 1 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...
  • Page 2 Guide Bar Lengths Available 12” to 16” Engine Idle Speed 2800 RPM Wide Open Throttle 14,000 RPM (with bar and chain installed) © STIHL Inc., Virginia Beach, VA 2013 US/STR Become Familiar With the Controls confidential Master Control Lever™ A single lever...
  • Page 3 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 Starting Features confidential 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...
  • Page 4 © STIHL Inc., Virginia Beach, VA 2013 US/STR Chain and Bar Color Code Marking confidential 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...
  • Page 5 Install Bar & Chain: Quick Chain Adjuster confidential 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 ©...
  • Page 6 Make sure the cutters on top of the bar are facing away from the powerhead! WRONG WRONG CORRECT © STIHL Inc., Virginia Beach, VA 2013 US/STR Quick Chain Adjuster (QCA) confidential The QCA allows the user to adjust the...
  • Page 7 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 Install Bar & Chain...
  • Page 8 Chain Adjustment confidential 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 ©...
  • Page 9 © STIHL Inc., Virginia Beach, VA 2013 US/STR Correct Chain Tension confidential Regardless of bar...
  • Page 10 US/STR Chain Brake 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...
  • Page 11 STIHL two-stroke oil mixed at a 50:1 ratio, or use STIHL MotoMix Add bar oil to the oil tank for chain lubrication © STIHL Inc., Virginia Beach, VA 2013 US/STR Starting the 1130 Saw confidential Push down on the interlock...
  • Page 12 Instruction Manual Directions for Safely Starting a Chain Saw (Never Drop Start a Chain Saw!) confidential © STIHL Inc., Virginia Beach, VA 2013 US/STR First Time Start-Up confidential When the engine starts, commonly referred to as a “false start”, move the Master Control Lever™...
  • Page 13 To stop the engine raise the Master Control Lever™ to the 0 (off) position, #4 in the picture © STIHL Inc., Virginia Beach, VA 2013 US/STR First Time Start-Up: Warm Up...
  • Page 14 US/STR Factory Testing of All STIHL Products confidential Every engine manufactured by STIHL has been started and operated in a test cell The test cell makes carburetor adjustments and verifies that the engine runs properly at idle, acceleration, and at...
  • Page 15 © STIHL Inc., Virginia Beach, VA 2013 US/STR DG Screws confidential STIHL uses the DG type of fastener in manufacturing because they cut their own threads the first...
  • Page 16 Damaged shroud may be a safety hazard for the operator Operated without an air filter or cover © STIHL Inc., Virginia Beach, VA 2013 US/STR 2. Warning Labels confidential Verify that warning labels...

  • Page 17: Belt Tension

    3. Cutting Attachment confidential Note type and condition Inspect for wear or damage Bar, chain, and sprocket within wear limits © STIHL Inc., Virginia Beach, VA 2013 US/STR 3. Cutting Attachment 4. Belt Tension confidential If the unit is a trimmer or a concrete saw: Tap head eyelets worn, spool worn, retainer secure Belt tension correct;...
  • Page 18 Be sure the throttle moves freely © STIHL Inc., Virginia Beach, VA 2013 US/STR 5. Operator Controls confidential The throttle must be squeezed all the way open before the Master Control Lever™...
  • Page 19 Now squeeze the trigger and it should snap up to the I position automatically © STIHL Inc., Virginia Beach, VA 2013 US/STR 5. Operator Controls confidential Finally the Master Control Lever™...
  • Page 20 In the back position the sprocket must spin easily © STIHL Inc., Virginia Beach, VA 2013 US/STR 6. Verify Anti-vibration Components confidential Most STIHL chain saws and line trimmers have an anti-vibration system that should be inspected for...
  • Page 21 “give” to the anti- vibe rubber bushings There should not be any looseness to the handle assembly © STIHL Inc., Virginia Beach, VA 2013 US/STR 7. Inspect Starter System confidential Inspect rope, handle, and eyelet for wear or damage Pull the rope to it’s full extended length and be sure it is...
  • Page 22 There should be a pinch mark all the way around the edge of the filter to seal it Verify that the housing is not cracked or damaged © STIHL Inc., Virginia Beach, VA 2013 US/STR 10. Carburetor Mixture Screws confidential...
  • Page 23 This carburetor uses a fixed orifice jet to regulate the amount of fuel available to the engine and is not adjustable © STIHL Inc., Virginia Beach, VA 2013 US/STR 10. Carburetor Screw Settings confidential 4229 121 2701...
  • Page 24 Use a side to side rocking motion while pushing against the hose to walk it off of the fitting © STIHL Inc., Virginia Beach, VA 2013 US/STR 11. Spark Plug Connection confidential Use a twisting motion to remove the spark plug connection...
  • Page 25 A fouled or defective spark plug may not show spark on the tester even if the ignition system is OK © STIHL Inc., Virginia Beach, VA 2013 US/STR 12. Spark Test confidential If there is still a no spark condition with a...
  • Page 26 13. Spark Plug confidential Verify that the correct plug is installed for an 1130 saw: Bosch WSR6F STIHL Part Number 1110 400 7005 NGK BPMR7A STIHL Part Number 0000 400 7000 Other units may use a different part number with a different heat range, so always look it up! Set all STIHL spark plugs at .020”...
  • Page 27 Caused by Both of these rich fuel/air plugs have served mixture their useful life © STIHL Inc., Virginia Beach, VA 2013 US/STR 14. Muffler confidential Remove the 2 muffler nuts and deflector plate and inspect the spark arrester screen...
  • Page 28 Rock the cap retainer to the side Remove starter housing Reinstall the caps if necessary to prevent fuel or oil from running out on the work area © STIHL Inc., Virginia Beach, VA 2013 US/STR 15. Cylinder Leak Down Test...
  • Page 29 A piston in good condition will still have the radial machine marks across the skirt indicating little or no wear © STIHL Inc., Virginia Beach, VA 2013 US/STR 16. Inspect Exhaust Port and Piston confidential Spray some lubricant on...
  • Page 30 Verify that the flywheel fins are in good condition © STIHL Inc., Virginia Beach, VA 2013 US/STR 18. Magneto Air Gap...
  • Page 31 If the unit has fuel in it carefully remove the cap and wave your hand over the opening while smelling for a sour odor that may indicate old stale fuel © STIHL Inc., Virginia Beach, VA 2013 US/STR 19. Fuel Tank...
  • Page 32 The filter body screen should be clear and in good condition, and the element may have oil staining but should not be dark or fouled or have any kind of coating on it © STIHL Inc., Virginia Beach, VA 2013 US/STR...
  • Page 33 Hook up the tester and place the filter on a towel and pump the tester 2 times No pressure should build up and if the filter is wet with fuel it should clearly flow out © STIHL Inc., Virginia Beach, VA 2013 US/STR 21. Pressure Test Fuel Line...
  • Page 34 Remove Carb confidential Hold the choke shutter closed and carefully remove the link © STIHL Inc., Virginia Beach, VA 2013 US/STR Remove Carb confidential Carefully slide the fuel line off of the fitting © STIHL Inc., Virginia Beach, VA 2013...
  • Page 35 Remove Carb confidential Hold the throttle wide open and carefully remove the link © STIHL Inc., Virginia Beach, VA 2013 US/STR Remove Carb confidential Gently pry the Master Control Lever™ up on the left side © STIHL Inc., Virginia Beach, VA...
  • Page 36 Remove Carb confidential Slide the Master Control Lever™ to the left and let it hang out of the way by the ground wire © STIHL Inc., Virginia Beach, VA 2013 US/STR Remove Carb confidential Hold the fuel line down out of the way and slide the carb off of the studs ©...
  • Page 37 21. Pressure Test Fuel Line confidential To test the fuel line by itself, plug one end and test through the other It should hold steady at 10 PSI © STIHL Inc., Virginia Beach, VA 2013 US/STR 22. Pressure Test Tank confidential...
  • Page 38 If the needle does not leak back to zero quickly the tank vent must be replaced and then re-test © STIHL Inc., Virginia Beach, VA 2013 US/STR 24. Inspect Intake Side Of Piston confidential With the carb removed...
  • Page 39 © STIHL Inc., Virginia Beach, VA 2013 US/STR 25. Impulse Signal Present confidential...
  • Page 40 © STIHL Inc., Virginia Beach, VA 2013 US/STR 26. Vacuum and Pressure Test of Crankcase confidential The Service Manual for each...
  • Page 41 Rotate the crankshaft back and forth while the crankcase is under vacuum to verify that the seals are holding properly Pump 0.5 bar of pressure into the engine and it should hold steady for at least 20 seconds © STIHL Inc., Virginia Beach, VA 2013 US/STR Pressure Test Results...
  • Page 42 27. Crankshaft and Bearing Condition confidential See if the flywheel moves in and out or up and down There should not be any loose play in the crankshaft bearings © STIHL Inc., Virginia Beach, VA 2013 US/STR 28. Carburetor confidential...
  • Page 43 29. Other Observations; Final Running confidential This is where any other observations about the unit not specifically covered by one of the numbered items on the STIHL Engine Check can be recorded Once repairs have been made the last part of the STIHL...
  • Page 44 This presentation has been prepared by: Eddie Anderson Technical Training Supervisor STIHL Inc. Virginia Beach, VA eddie.anderson@stihl.us © STIHL Inc., Virginia Beach, VA 2013 US/STR...

This manual is also suitable for:

Ms 170

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