1. DL manuals
  2. Wacker Neuson
  3. Engine
  4. WM 130
  5. Repair Manual

Wacker Neuson WM 130 Repair Manual

Other manuals for WM 130: Repair Manual, Operator's Manual

Summary of WM 130

  • Page 1

    5000192069 03 0313 5 0 0 0 1 9 2 0 6 9 repair manual engine wm 130 wm 170 wm 270 en.

  • Page 2

    Copyright notice © copyright 2013 by wacker neuson production americas llc all rights, including copying and distribution rights, are reserved. This publication may be photocopied by the original purchaser of the machine. Any other type of reproduction is prohibited without express written permissio...

  • Page 3: Wm 130 / 170 / 270

    Wm 130 / 170 / 270 foreword wc_tx003288gb.Fm 3 foreword machine documentation from this point forward in this documentation, wacker neuson production americas llc will be referred to as wacker neuson. Keep a copy of the operator’s manual with the machine at all times. Use the separate parts book sup...

  • Page 4: Foreword

    Foreword wm 130 / 170 / 270 4 wc_tx003288gb.Fm contact your wacker neuson dealer immediately if you have questions about approved or unapproved parts, attachments, or modifications..

  • Page 5: Table of Contents

    Wc_br5000192069_03toc.Fm 5 table of contents wm 130/170/270 foreword 3 1 safety information 9 1.1 operating safety ................................................................................ 10 1.2 operator safety while using internal combustion engines ............... 10 1.3 service safety ......

  • Page 6: Table of Contents

    6 wc_br5000192069_03toc.Fm table of contents wm 130/170/270 7 teardown/rebuild procedures 37 7.1 tools ....................................................................................................37 7.2 ordering parts ..............................................................................

  • Page 7: Table of Contents

    Wc_br5000192069_03toc.Fm 7 table of contents wm 130/170/270 9.19 ignition coil ......................................................................................... 67 9.20 speed control assembly and carburetor ........................................... 68 9.21 governor lever .....................

  • Page 8: Table of Contents

    8 wc_br5000192069_03toc.Fm table of contents wm 130/170/270 13 troubleshooting 104 13.1 troubleshooting table .......................................................................104.

  • Page 9: Wm 130 / 170 / 270

    Wm 130 / 170 / 270 safety information wc_si000090gb.Fm 9 1 safety information this manual contains danger, warning, caution, notice, and note signal words which must be followed to reduce the possibility of personal injury, damage to the equipment, or improper service. This is the safety alert symbo...

  • Page 10: Safety Information

    Safety information wm 130 / 170 / 270 10 wc_si000090gb.Fm 1.1 operating safety familiarity and proper training are required for the safe operation of equipment! Equipment operated improperly or by untrained personnel can be dangerous! Read the operating instructions contained in this manual and fami...

  • Page 11: Wm 130 / 170 / 270

    Wm 130 / 170 / 270 safety information wc_si000090gb.Fm 11 operating safety when running the engine: • keep the area around exhaust pipe free of flammable materials. • check the fuel lines and the fuel tank for leaks and cracks before starting the engine. Do not run the machine if fuel leaks are pres...

  • Page 12: Safety Information

    Safety information wm 130 / 170 / 270 12 wc_si000090gb.Fm 1.3 service safety a poorly maintained machine can become a safety hazard! In order for the machine to operate safely and properly over a long period of time, periodic maintenance and occasional repairs are necessary. 1.3.1 do not attempt to ...

  • Page 13: Wm 130 / 170 / 270

    Wm 130 / 170 / 270 safety information wc_si000090gb.Fm 13 1.4 safety labels wacker neuson machines use international pictorial labels where needed. These labels are described below. Label meaning read the operator’s manual for machine information. Warning! Hot surface danger! Engines emit carbon mon...

  • Page 14: Operation

    Operation wm 130 / 170 / 270 14 wc_tx000241gb.Fm 2 operation 2.1 recommended fuel this engine is certified to operate on automotive unleaded gasoline. Use only fresh, clean gasoline. Gasoline containing water or dirt will damage fuel system. Use of oxygenated fuels some conventional gasolines are bl...

  • Page 15: Wm 130 / 170 / 270

    Wm 130 / 170 / 270 operation wc_tx000241gb.Fm 15 2.3 to start see graphic: wc_gr000655 2.3.1 open fuel valve by moving lever down (a1). Note: if engine is cold, move choke lever to close position (d2). If engine is hot, set choke to open position (d1). 2.3.2 turn engine switch to “on” (b2). 2.3.3 op...

  • Page 16: Maintenance

    Maintenance wm 130 / 170 / 270 16 wc_tx000242gb.Fm 3 maintenance 3.1 maintaining the emission control system normal maintenance, replacement, or repair of emission control devices and systems may be performed by any repair establishment or individual; however, warranty repairs must be performed by a...

  • Page 17: Wm 130 / 170 / 270

    Wm 130 / 170 / 270 maintenance wc_tx000242gb.Fm 17 3.3 spark plug see graphic: wc_gr000028 clean or replace spark plug as needed to ensure proper operation. The muffler becomes very hot during operation and remains hot for a while after stopping the engine. Do not touch the muffler while it is hot. ...

  • Page 18: Maintenance

    Maintenance wm 130 / 170 / 270 18 wc_tx000242gb.Fm 3.4 engine oil see graphic: wc_gr000087 3.4.1 drain oil while engine is still warm. Note: in the interests of environmental protection, place a plastic sheet and a container under the machine to collect any liquid which drains off. Dispose of this l...

  • Page 19: Wm 130 / 170 / 270

    Wm 130 / 170 / 270 maintenance wc_tx000242gb.Fm 19 3.5 cleaning the fuel strainer 3.5.1 to remove water and dirt, close the fuel lever and remove the fuel strainer. 3.5.2 inspect the fuel strainer (a) for water and dirt. 3.5.3 after removing any dirt and water, wash the fuel cup with a nonflammable ...

  • Page 20: Maintenance

    Maintenance wm 130 / 170 / 270 20 wc_tx000242gb.Fm 3.6 servicing the air cleaner do not use gasoline or other types of low-flash point solvents for cleaning the air cleaner. A fire or explosion could result. Notice: do not run the engine without the air cleaner. Severe engine damage will occur. The ...

  • Page 21: Wm 130 / 170 / 270

    Wm 130 / 170 / 270 maintenance wc_tx000242gb.Fm 21 3.7 storage if machine is being stored for more than 30 days: 3.7.1 drain fuel from tank. Start engine and run until remaining fuel is used. 3.7.2 remove spark plug. Pour approximately 5 cc of clean sae 10w30 engine oil into cylinder through spark p...

  • Page 22: Technical Data

    Technical data wm 130 / 170 / 270 22 wc_td000091gb.Fm 4 technical data wm 130 wm 170 wm 270 engine type 4-stroke, overhead valve, single cylinder engine make wacker rated power kw (hp) 3.2 (4.3) 4.2 (5.7) 6.6 (9.0) displacement cm³ (in³) 126 (7.69) 169 (10.31) 265 (16.17) engine speed - max. Rpm 400...

  • Page 23

    Wc_tx001768gb.Fm 23 emission control systems information and warranty 5 emission control systems information and warranty the emission control warranty and associated information is valid only for the u.S.A., its territories, and canada. 5.1 emission control system background information introductio...

  • Page 24

    Wc_tx001768gb.Fm 24 emission control systems information and warranty tampering and altering tampering with or altering the emission control system may increase emissions beyond the legal limit. If evidence of tampering is found, wacker neuson may deny a warranty claim. Among those acts that constit...

  • Page 25

    Wc_tx001768gb.Fm 25 emission control systems information and warranty for the components listed in the following table, an authorized wacker neuson dealer/service center will, at no cost to you, make the necessary diagnosis, repair, or replacement necessary to ensure that the engine/equipment compli...

  • Page 26

    Wc_tx001768gb.Fm 26 emission control systems information and warranty evaporative emissions what is not covered failures other than those resulting from defects in material or workmanship. Any systems or parts which are affected or damaged by owner abuse, tam- pering, neglect, improper maintenance, ...

  • Page 27

    Wc_tx001768gb.Fm 27 emission control systems information and warranty owner’s warranty responsibility the engine/equipment owner is responsible for the performance of the required maintenance listed in the wacker neuson engine/equipment operator’s manual. Wacker neuson recommends that all receipts c...

  • Page 28: Theory of Operation

    Theory of operation wm 130/170/270 wc_tx000378gb.Fm 28 6 theory of operation 6.1 component descriptions component illustration component description cylinder and crankcase the cylinder and crankcase are die-cast in alu- minum as a single piece. A special cast iron cylinder liner is molded into the a...

  • Page 29: Wm 130/170/270

    Wm 130/170/270 theory of operation wc_tx000378gb.Fm 29 cooling system the engine uses a forced-air cooling system in which a cooling fan (which also works as a fly- wheel) forces cooling air into the cylinder and cylinder head. Baffles are provided to guide the flow of the cooling air. Connecting ro...

  • Page 30: Theory of Operation

    Theory of operation wm 130/170/270 wc_tx000378gb.Fm 30 cylinder head the cylinder head is an aluminum die-casting. The intake and exhaust ports are arranged in a cross direction to improve combustion effi- ciency. Governor system the engine is equipped with a centrifugal fly- weight-type governor th...

  • Page 31: Wm 130/170/270

    Wm 130/170/270 theory of operation wc_tx000378gb.Fm 31 ignition system the ignition system is a transistor-controlled magneto system with the ignition timing set at 23° before top dead center. The magneto con- sists of an ignition coil (a) and flywheel (b). The flywheel (which also works as a fan) i...

  • Page 32: Theory of Operation

    Theory of operation wm 130/170/270 wc_tx000378gb.Fm 32 decompression system the automatic decompression system is mounted on the camshaft. It opens the exhaust valve before the compression top, thereby alleviating the compression pressure and reducing the force required to pull the recoil starter. D...

  • Page 33: Wm 130/170/270

    Wm 130/170/270 theory of operation wc_tx000378gb.Fm 33 6.2 cross section across shaft.

  • Page 34: Theory of Operation

    Theory of operation wm 130/170/270 wc_tx000378gb.Fm 34 6.3 components—cross section across shaft ref. Description ref. Description a tank cap h oil sensor b governor shaft i charge coil c governor lever j flywheel d governor gear k recoil starter e crankshaft l starter pulley f connecting rod m blow...

  • Page 35: Wm 130/170/270

    Wm 130/170/270 theory of operation wc_tx000378gb.Fm 35 6.4 cross section along shaft.

  • Page 36: Theory of Operation

    Theory of operation wm 130/170/270 wc_tx000378gb.Fm 36 6.5 components—cross section along shaft ref. Description ref. Description a chain guide m connecting rod b piston n oil sensor c muffler cover o crankshaft d muffler p crankcase e exhaust valve q oil drain plug f rocker arm r oil gauge g camsha...

  • Page 37: Wm 130/170/270 Repair

    Wm 130/170/270 repair teardown/rebuild procedures wc_tx000379gb.Fm 37 7 teardown/rebuild procedures 7.1 tools because all possible problems encountered while repairing the machine cannot be anticipated, it is up to the mechanic to use common sense and good judgement in tool selection. The use of any...

  • Page 38: Disassembly Procedures

    Disassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 38 8 disassembly procedures 8.1 draining oil see graphic: wc_gr001750 note: in the interests of environmental protection, place plastic sheeting and a container under the machine to collect the liquid which drains off. Dispose of this liq...

  • Page 39: Wm 130/170/270 Repair

    Wm 130/170/270 repair disassembly procedures wc_tx000379gb.Fm 39 8.2 removing air cleaner see graphic: wc_gr001751 8.2.1 remove m6 flange bolt (a) and the two m6 flange nuts (b). 8.2.2 remove the air cleaner while pulling the breather pipe (c) away from the rocker cover..

  • Page 40: Disassembly Procedures

    Disassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 40 8.3 removing stop switch, recoil starter, and blower housing see graphic: wc_gr001752 8.3.1 remove the two m4 screws (a), disconnect wire, and remove the stop switch (b). 8.3.2 remove the four m6 bolts (c) and remove the recoil starter...

  • Page 41: Wm 130/170/270 Repair

    Wm 130/170/270 repair disassembly procedures wc_tx000379gb.Fm 41 8.4 removing fuel tank, muffler, and muffler cover see graphic wc_gr001753 8.4.1 remove any remaining fuel by using the carburetor drain (a). Dispose of fuel in proper manner. 8.4.2 remove the m6 mounting nuts (b) and m6 bolt (c). 8.4....

  • Page 42: Disassembly Procedures

    Disassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 42 8.5 removing governor, carburetor, and speed control lever see graphic: wc_gr001763 8.5.1 loosen, but do not remove, the bolt securing the governor lever (a) to the governor shaft (b). 8.5.2 remove the governor spring (c). 8.5.3 remove...

  • Page 43: Wm 130/170/270 Repair

    Wm 130/170/270 repair disassembly procedures wc_tx000379gb.Fm 43 8.6 removing ignition coil, starter pulley, and flywheel see graphic: wc_gr001764 8.6.1 remove the spark plug cap (a) from the spark plug. Remove the screws (b) securing the ignition coil (i) and remove the ignition coil. 8.6.2 remove ...

  • Page 44: Disassembly Procedures

    Disassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 44 8.7 removing case baffle, charge coil, and spark plug see graphic: wc_gr001765 8.7.1 remove the screw (a) securing the case baffle (b) and remove the case baffle. 8.7.2 if equipped, remove the m6 screw (c) securing the clamp (d) and re...

  • Page 45: Wm 130/170/270 Repair

    Wm 130/170/270 repair disassembly procedures wc_tx000379gb.Fm 45 8.8 removing rocker cover and rocker arm (older) see graphic: wc_gr001766 8.8.1 remove the m6 bolts (a) securing the rocker cover (b) and remove the rocker cover. Remove the rocker cover gasket (c). 8.8.2 remove the rocker arm pin (d) ...

  • Page 46: Disassembly Procedures

    Disassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 46 8.9 removing rocker cover and rocker arm (newer) see graphic: wc_gr001766 8.9.1 remove the m6 bolts (a) securing the rocker cover (b) and remove the rocker cover. Remove the rocker cover gasket (c). 8.9.2 remove the rocker arm pin (d) ...

  • Page 47: Wm 130/170/270 Repair

    Wm 130/170/270 repair disassembly procedures wc_tx000379gb.Fm 47 8.10 removing main bearing cover see graphic: wc_gr001767 8.10.1 remove the six m8 bolts (a) securing the main bearing cover (b). If necessary, tap the main bearing cover with a rubber mallet (c) to loosen it. 8.10.2 be careful not to ...

  • Page 48: Disassembly Procedures

    Disassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 48 8.11 removing tensioner and camshaft see graphic: wc_gr001768 8.11.1 remove the tensioner pin (a), tensioner spring (b), and the tensioner (c). 8.11.2 remove m6 camshaft pin retaining bolt (d). Remove the camshaft pin (e). Be careful n...

  • Page 49: Wm 130/170/270 Repair

    Wm 130/170/270 repair disassembly procedures wc_tx000379gb.Fm 49 8.12 removing cylinder head and valves see graphic: wc_gr001769 8.12.1 remove the m8 bolts (a) securing the cylinder head (b) to the crankcase and remove the cylinder head. Also remove the cylinder head gasket (c). Be careful not to lo...

  • Page 50: Disassembly Procedures

    Disassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 50 8.13 removing connecting rod and piston see graphic: wc_gr001770 8.13.1 scrape off any carbon from the cylinder and the piston head (a). Remove the two m6 connecting rod bolts (b) and remove the connecting rod cap (c). 8.13.2 rotate th...

  • Page 51: Wm 130/170/270 Repair

    Wm 130/170/270 repair disassembly procedures wc_tx000379gb.Fm 51 8.14 removing crankshaft and oil sensor see graphic: wc_gr001771 8.14.1 remove woodruff key (a). 8.14.2 taking care not to damage the oil seal, remove the crankshaft (b) from the crankcase (c) by tapping its magneto-side end with a rub...

  • Page 52: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 52 9 reassembly procedures 9.1 notes on reassembly observe the following prior to/during reassembly of the engine: • clean each part carefully, taking special care with the piston, cylinder, crankshaft, connecting rod, and bearings. • scra...

  • Page 53: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 53 9.3 crankshaft see graphic: wc_001791 9.3.1 wrap the keyway portion of the crankshaft (a) with polyvinyl tape (b) and insert the crankshaft into the crankcase, taking care not to damage the oil seal lip. 9.3.2 remove the polyvinyl tape ...

  • Page 54: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 54 9.4 piston and piston rings see graphic: wc_gr001749, wc_gr001792, and wc_gr001793 note: when installing the piston rings, make sure not to twist the rings too much as they may be damaged. 9.4.1 install each piston ring in the correct g...

  • Page 55: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 55 9.5 piston and connecting rod see graphic: wc_gr001794 and wc_gr001795 9.5.1 apply a coat of oil to the inside of the connecting rod’s small end (a). 9.5.2 align the mark on the piston head (b) with the “mag” mark on the connecting rod....

  • Page 56: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 56 9.6 connecting rod see graphic: wc_gr001796 and wc_gr001797 9.6.1 position the piston rings so that the gaps in the rings are at 90° intervals from each other (a = top ring, b = second ring, c = oil ring). 9.6.2 apply oil to the piston ...

  • Page 57: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 57 9.7 intake and exhaust valves see graphic: wc_gr001798 note: replace the valves if they show signs of wear. See clearance data and limits table. 9.7.1 carefully scrape off any carbon deposits on the combustion chamber. 9.7.2 before inst...

  • Page 58: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 58 9.8 chain guide see graphic: wc_gr001801 9.8.1 mount the chain guide (a) to the crankcase. Note: use mounting position (b)..

  • Page 59: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 59 9.9 cylinder head see graphic: wc_gr001802 and wc_gr001803 note: replace the head gasket (b) whenever the cylinder head is removed. 9.9.1 inspect for and repair any scratches on the cylinder head (a) mounting surface. 9.9.2 using four m...

  • Page 60: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 60 9.10 setting the timing chain see graphic: wc_gr001804 9.10.1 align the timing mark (a) on the crankshaft (b) with the mark plate (c) of the timing chain. 9.10.2 align the timing mark (a) on the crankshaft (b) with the mark plate (c) on...

  • Page 61: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 61 9.11 mounting the camshaft on the cylinder head see graphic: wc_gr001805 9.11.1 mount the camshaft (a) on the cylinder head by inserting the camshaft pin (b) through the head. Secure the pin with the m6 x 12 bolt (c). 9.11.2 also mount ...

  • Page 62: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 62 9.12 balancer shaft option (wm 270 only) see graphic: wc_gr001806 9.12.1 mount the balancer shaft on the crankcase, align the timing marks (a) on the balancer gear (b) and the crankshaft gear (c). Note: incorrect alignment of the timing...

  • Page 63: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 63 9.14 mounting rocker arms see graphic: wc_gr001808, wc_gr010382 note: complete this procedure when the piston is at the top dead center position (a). (timing mark is 90° to the cylinder head surface.) 9.14.1 insert the rocker arm pin (b...

  • Page 64: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 64 9.15 valve clearance adjustment see graphic: wc_gr001809 9.15.1 temporarily fit the flywheel (a). 9.15.2 rotate the crankshaft up to the top dead center position. Measure the clearance by inserting the thickness gauge (b) between the va...

  • Page 65: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 65 9.16 rocker cover and spark plug see graphic: wc_gr001810 note: replace the gasket with a new one each time the rocker cover is removed. 9.16.1 using four m6 x 12 bolts (a), secure the rocker cover (b) and gasket (c) to the cylinder hea...

  • Page 66: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 66 9.17 case baffle see graphic: wc_gr001811 9.17.1 align the top (a) and bottom (b) of the baffle (c) with the crankcase and using the m6 (wm 130/170) or the m8 (wm 270) bolt (d) secure the case baffle to the crankcase..

  • Page 67: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 67 9.18 flywheel and starter pulley see graphic: wc_gr001812 note: when mounting the flywheel, be sure to wipe off any oil on the tapered portion of the crankshaft and flywheel. 9.18.1 place the flywheel on the crankshaft. Align the two bo...

  • Page 68: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 68 9.20 speed control assembly and carburetor see graphic: wc_gr001814 9.20.1 using two m6 x 12 bolts (a), secure the speed control assembly (b) to the engine. 9.20.2 using one m6 x 12 bolt (g), secure the head baffle (c) to the engine. 9....

  • Page 69: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 69 9.21 governor lever see graphic: wc_gr001815 9.21.1 slide the governor rod through the rod spring (a). Connect the governor rod/spring assembly (b) to the throttle lever of the carburetor. 9.21.2 attach the governor rod/spring assembly ...

  • Page 70: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 70 9.22 air cleaner base see graphic: wc_gr001816 9.22.1 insert the breather pipe (a) into the rocker cover, then using one m6 x 20 flange bolt (b) and two m6 flange nuts (c), mount the air cleaner base (d) to the engine. 9.23 governor sys...

  • Page 71: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 71 9.24 muffler see graphic: wc_gr001818 note: remove any tape or cloth used to cover the exhaust port when the engine was disassembled. 9.24.1 place the gasket, muffler side up (a), on the engine. 9.24.2 using one m8 x 12 bolt (b) and two...

  • Page 72: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 72 9.25 fuel tank see graphic: wc_gr001819 9.25.1 connect the fuel line (a) with clamp. 9.25.2 using two m6 nuts (b) and one m6 x 25 bolt (wm 130/wm 170) or one m8 x 25 bolt (wm 270) (c), secure the fuel tank (d) to the crankcase..

  • Page 73: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 73 9.26 blower housing and recoil starter see graphic: wc_gr001820 9.26.1 mount the ignition coil cord on the crankcase by aligning it with the case baffle. 9.26.2 using four m6 x 12 bolts (a), mount the blower housing (b) to the engine. 9...

  • Page 74: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 74 9.27 stop switch see graphic: wc_gr001821 9.27.1 using two m4 screws, mount the stop switch (a) to the blower housing. 9.27.2 refer to the wiring schematic for wiring details..

  • Page 75: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 75 9.28 air cleaner see graphic: wc_gr001751 9.28.1 insert the breather tube (c) into the rocker cover while installing the air cleaner assembly onto the engine. 9.28.2 using one m6 flange bolt (a) and two m6 flange nuts (b), secure the ai...

  • Page 76: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 76 9.29 external inspection 9.29.1 after reassembly is complete, check that the wiring is correct and that there are no loose nuts and bolts or any other faults on the outside of the engine. 9.30 engine oil see graphic: wc_gr001822 using e...

  • Page 77: Wm 130/170/270 Repair

    Wm 130/170/270 repair reassembly procedures wc_tx000379gb.Fm 77 9.31 filling engine with oil see graphic: wc_gr001750 9.31.1 check that gasket (b) and drain plug (a) are in place and secure. 9.31.2 remove oil gauge (c) and fill engine with automotive-type engine oil, api service class se or higher. ...

  • Page 78: Reassembly Procedures

    Reassembly procedures wm 130/170/270 repair wc_tx000379gb.Fm 78 9.32 break-in operation a new engine or one that has been completely overhauled by being fitted with a new piston, rings, valves, and connecting rod should be thoroughly run-in before being put into service. Good bearing surfaces and ru...

  • Page 79: Wm 130/170/270 Repair

    Wm 130/170/270 repair sub systems wc_tx000382gb.Fm 79 10 sub systems 10.1 automatic decompression system see graphic: wc_gr001827 wm-series engines employ an automatic decompression system as a standard feature. This feature enables easy starting of the engine with lighter recoil pull. The automatic...

  • Page 80: Sub Systems

    Sub systems wm 130/170/270 repair wc_tx000382gb.Fm 80 10.2 fuel system diagram ref description ref description ref description a fuel flow f float k pilot air jet b needle valve g main jet l bypass c float h main nozzle m pilot outlet d float chamber i choke valve e pilot jet j main air jet.

  • Page 81: Wm 130/170/270 Repair

    Wm 130/170/270 repair sub systems wc_tx000382gb.Fm 81 10.3 carburetor specifications float system the float chamber is located below the carburetor body. Through the operation of the float and the needle valve, the float chamber maintains a constant fuel level while the engine is working. The fuel f...

  • Page 82: Sub Systems

    Sub systems wm 130/170/270 repair wc_tx000382gb.Fm 82 10.4 carburetor overhaul see graphic: wc_gr001829 throttle system • when the throttle stop screw (26) is removed, the spring (25) can be removed. • remove the screw (22) and the throttle valve (23), then take out the throttle shaft (24). When rem...

  • Page 83: Wm 130/170/270 Repair

    Wm 130/170/270 repair sub systems wc_tx000382gb.Fm 83 10.5 carburetor exploded view.

  • Page 84: Sub Systems

    Sub systems wm 130/170/270 repair wc_tx000382gb.Fm 84 10.6 recoil starter disassembly see graphic: wc_gr001830 wear eye protection when working on the recoil starter. To release the reel spring power: 10.6.1 hold the starter knob and pull out the starter rope. 10.6.2 pull out the rope fully and alig...

  • Page 85: Wm 130/170/270 Repair

    Wm 130/170/270 repair sub systems wc_tx000382gb.Fm 85 see graphic: wc_gr001831 to remove the components: 10.6.6 grip the case (a) and loosen the set screw (b). 10.6.7 remove, in this order: the set screw, the ratchet guide (c), the friction spring (d), and the ratchet (e). See graphic: wc_gr001831 r...

  • Page 86: Sub Systems

    Sub systems wm 130/170/270 repair wc_tx000382gb.Fm 86 reassembly see graphic: wc_gr001832 re-installing the reel: 10.6.11 apply grease (exxon unirex or equivalent) (a) to the surface of the case. 10.6.12 adjust the position of the inner end of the spring reel. Reference (b): position where the inner...

  • Page 87: Wm 130/170/270 Repair

    Wm 130/170/270 repair sub systems wc_tx000382gb.Fm 87 see graphic: wc_gr001835 tensioning the reel spring: 10.6.17 grip the case and turn the reel 6 times counterclockwise. 10.6.18 rotate the reel so that the rope hole (a) is aligned with the rope guide (b). See graphic: wc_gr001836 and wc_gr001837 ...

  • Page 88: Sub Systems

    Sub systems wm 130/170/270 repair wc_tx000382gb.Fm 88 10.7 checking the recoil starter after reassembly note: carry out the following procedures to ensure proper operation of the starter assembly. 10.7.1 pull the starter rope 2–3 times. • if the starter knob is too heavy to pull, check that each par...

  • Page 89: Wm 130/170/270 Repair

    Wm 130/170/270 repair sub systems wc_tx000382gb.Fm 89 10.8 other starter checks see graphic: wc_gr001838 and wc_gr001839 10.8.1 if the spring escapes from the reel (a) during assembly: • hook the outer end of the spring (b) onto the gap in the reel and rewind the spring, holding the spring (c) with ...

  • Page 90: Electrical

    Electrical wm 130/170/270 repair wc_tx000381gb.Fm 90 11 electrical 11.1 magneto wacker engines use a transistor igniter circuit (tic) type, breakerless magneto ignition system. The tic has the ignition coil outside the flywheel and a lighting coil inside. The flywheel is a specialized piece of equip...

  • Page 91: Wm 130/170/270 Repair

    Wm 130/170/270 repair electrical wc_tx000381gb.Fm 91 11.3 wm 130/wm170 ignition coil internal circuit 11.4 basic theory see graphic: wc_gr001823 11.4.1 revolution of the flywheel generates electricity on the primary side of the ignition coil, and the electric current i 1 flows to the power transisto...

  • Page 92: Electrical

    Electrical wm 130/170/270 repair wc_tx000381gb.Fm 92 11.5 wm 270 ignition coil internal circuit 11.6 ignition timing characteristics ref. Description ref. Description 1 primary coil 6 revolution sensing resistor 2 power transistor 7 secondary coil 3 low speed ignition timing control circuit 8 spark ...

  • Page 93: Wm 130/170/270 Repair

    Wm 130/170/270 repair electrical wc_tx000381gb.Fm 93 11.7 wm 270 basic theory see graphic: wc_gr001824 and wc_gr001825 revolution of the flywheel generates electricity on the primary side of the ignition coil (1), and the base current i 1 flows to the power transistor (2). Current i 1 turns the powe...

  • Page 94: Electrical

    Electrical wm 130/170/270 repair wc_tx000381gb.Fm 94 11.8 wiring diagram ref description ref description a spark plug e oil sensor control unit b stop switch f oil sensor c ignition coil (with built-in transistor) g to led if equipped d flywheel wire colors b black r red y yellow or orange g green t...

  • Page 95: Wm 130/170/270 Repair

    Wm 130/170/270 repair clearance data and limits table wc_tx000385gb.Fm 95 12 clearance data and limits table 12.1 term descriptions the following table lists critical dimensions of specific parts. The “standard” column lists the dimension of the part as new from the factory. The “limit” column lists...

  • Page 96: Wm 130/170/270 Repair

    Clearance data and limits table wm 130/170/270 repair wc_tx000385gb.Fm 96 item model standard mm (in.) limit mm (in.) cylinder head wm 130 wm 170 wm 270 0.05 or less (0.002) 0.1 (0.004) intake/ exhaust valve contact width wm 130 wm 170 wm 270 0.7–1.0 (0.0276– 0.0394) --- intake exhaust wm 130 wm 170...

  • Page 97: Wm 130/170/270 Repair

    Wm 130/170/270 repair clearance data and limits table wc_tx000385gb.Fm 97 cylinder inner diame- ter standard wm 130 58.000–58.019 (2.2835–2.2842) to be rebored when the dif- ference between max. And min. Diameter reaches 0.1 (0.004). Wm 170 67.000–67.019 (2.6378–2.6385) wm 270 75.000–75.019 (2.9528–...

  • Page 98: Wm 130/170/270 Repair

    Clearance data and limits table wm 130/170/270 repair wc_tx000385gb.Fm 98 piston outer diameter at skirt in thrust direction standard wm 130 57.980–58.000 (2.2827–2.2835) 57.89 (2.2791) wm 170 66.960–67.000 (2.6362–2.6378) 66.88 (2.6331) wm 270 74.980–75.000 (2.9520–2.9527) 74.89 (2.9484) oversize (...

  • Page 99: Wm 130/170/270 Repair

    Wm 130/170/270 repair clearance data and limits table wc_tx000385gb.Fm 99 piston pin hole wm 130 12.991–13.009 (0.5115 - 0.5122) 13.035 (0.5132) wm 170 15.991–16.009 (0.6296 - 0.6303) 16.035 (0.6313) wm 270 17.991–18.009 (0.7083–0.7090) 18.035 (0.7224) piston pin outer diameter wm 130 12.992–13.000 ...

  • Page 100: Wm 130/170/270 Repair

    Clearance data and limits table wm 130/170/270 repair wc_tx000385gb.Fm 100 connecting rod large-end inner diameter wm 130 wm 170 30.000–30.016 (1.1811–1.1817) 30.1 (1.1850) wm 270 34.500–34.516 (1.3386–1.3392) 34.1 (1.3425) clearance between large end and crank pin wm 130 wm 170 wm 270 0.020–0.049 (...

  • Page 101: Wm 130/170/270 Repair

    Wm 130/170/270 repair clearance data and limits table wc_tx000385gb.Fm 101 large end side clearance wm 130 wm 170 wm 270 0.100–0.780 (0.040–0.307) 1.0 (0.0394) crankshaft crank pin outer diameter wm 130 wm 170 29.967–29.980 (1.1798–1.1803) 29.85 (1.1752) wm 270 34.467–34.480 (1.3570–1.3575) 34.35 (1...

  • Page 102: Wm 130/170/270 Repair

    Clearance data and limits table wm 130/170/270 repair wc_tx000385gb.Fm 102 cam sprocket inner diame- ter cam sprocket pin outer diameter cam inner diameter d 1 , d 2 wm 130 wm 170 wm 270 9.0–9.036 (0.3543–0.3557) 9.05 (0.3563) pin outer diameter d 3 , d 4 wm 130 wm 170 wm 270 8.953–8.975 (0.3525–0.3...

  • Page 103: Wm 130/170/270 Repair

    Wm 130/170/270 repair clearance data and limits table wc_tx000385gb.Fm 103 valve spring free lengt h wm 130 wm 170 wm 270 27.4 (1.0787) --- valve seat angle (intake and exhaust) valve cutter angle (a) valve contact width (b) intake exhaust wm 130 wm 170 wm 270 a: 90° b: 0.7–1.0 (0.0276–0.0394) 2.0 (...

  • Page 104: Troubleshooting

    Troubleshooting wm 130/170/270 repair wc_tx000386gb.Fm 104 13 troubleshooting if the engine shows any sign of malfunction, the cause should be determined immediately and the appropriate countermeasures should be taken to prevent the problem from worsening. This troubleshooting section describes cert...

  • Page 105: Wm 130/170/270 Repair

    Wm 130/170/270 repair troubleshooting wc_tx000386gb.Fm 105 starting difficulties 2. Fuel system problems 1) no fuel in tank fill tank 2) fuel hose clogged or pinched clean or replace 3) air in fuel lines check and retighten joints 4) poor quality gasoline, or water in gasoline replace with fresh gas...

  • Page 106: Troubleshooting

    Troubleshooting wm 130/170/270 repair wc_tx000386gb.Fm 106 p oor out put 1. Insufficient compres- sion 1) loose spark plug retighten, replace gasket 2) leakage from cylinder head gasket retighten; replace gasket 3) piston ring seizure or wear replace 4) piston or cylinder wear repair or replace 5) i...

  • Page 107: Wm 130/170/270 Repair

    Wm 130/170/270 repair troubleshooting wc_tx000386gb.Fm 107 rough idling 1. Carburetor system 1) low idling speed adjust 2) slow system passage clogged check and clean 2. Intake system 1) air mixing from air intake sys- tem joints check and tighten; replace gasket 3. Cylinder head 1) gasket faulty (b...

  • Page 108: Troubleshooting

    Troubleshooting wm 130/170/270 repair wc_tx000386gb.Fm 108 high fuel consumption 1. Fuel system 1) clogged air cleaner clean or replace 2) faulty needle valve and/or high fuel level in float chamber clean or replace 3) choke does not open fully repair or replace 2. Engine core compo- nents 1) low co...

  • Page 109: Threadlockers and Sealants

    Threadlockers and sealants threadlockers and sealants threadlocking adhesives and sealants are specified throughout this manual by a notation of “s” plus a number (s#) and should be used where indicated. Threadlocking compounds normally break down at temperatures above 175°c (350°f). If a screw or b...

  • Page 110: Threadlockers and Sealants

    Threadlockers and sealants threadlockers and sealants (continued) threadlocking adhesives and sealants are specified throughout this manual by a notation of “s” plus a number (s#) and should be used where indicated. Threadlocking compounds normally break down at temperatures above 175°c (350°f). If ...

  • Page 111: Torque Values

    Torque values torque values metric fasteners (din) torque values (based on bolt size and hardness) wrench size size nm ft.Lb. Nm ft.Lb. Nm ft.Lb. Metric inch metric inch m3 1.2 *11 1.6 *14 2.1 *19 5.5 7/32 2.5 – m4 2.9 *26 4.1 *36 4.9 *43 7 9/32 3 – m5 6.0 *53 8.5 6 10 7 8 5/16 4 – m6 10 7 14 10 17 ...

  • Page 112: Torque Values

    Torque values torque values (continued) inch fasteners (sae) size nm ft.Lb. Nm ft.Lb. Nm ft.Lb. Metric inch metric inch no.4 0.7 *6 1.0 *14 1.4 *12 5.5 1/4 – 3/32 no.6 1.4 *12 1.9 *17 2.4 *21 8 5/16 – 7/64 no.8 2.5 *22 3.5 *31 4.7 *42 9 11/32 – 9/64 no.10 3.6 *32 5.1 *45 6.8 *60 – 3/8 – 5/32 1/4 8.1...

  • Page 114

    Wacker neuson se, preußenstraße 41, d-80809 münchen, tel.: +49-(0)89-3 54 02-0 fax: +49 - (0)89-3 54 02-390 wacker neuson production americas llc, n92w15000 anthony ave., menomonee falls, wi 53051 tel. : (262) 255-0500 fax: (262) 255-0550 tel.: (800) 770-0957 wacker neuson limited - room 1701–03 & 1...