Craftsman 143.629012 Specifiche

This manual covers engine models:ECV100 - 120, H22 - 80, HH40 - 70, HHM80, HM70 - 100,HMSK70 - 110, HMXL70, HS40 - 50, HSK30 - 70, HSSK40 - 50,HT30 -

6This type of air filter can be serviced when restricted with dust or dirt. Wash the filter or pre-cleaner in a liquid detergentand water solution unt

96ENGINE SPECIFICATIONS STANDARD POINT IGNITION (Cont.)All models have point setting of .020" (.508 mm), spark plug gap of .030" (.762 mm),

97SOLID STATE AND EXTERNAL IGNITIONAll solid state models have air gap settings of .0125" (.3175 mm), spark plug gap of .030" (.762 mm), val

98SOLID STATE AND EXTERNAL IGNITION* Check to detemine bore sizeNotes: (A) VM & HM80 - Displacement 19.41 (318 cc) (B) VM & HM80 - Bore 3-1/8

99SOLID STATE AND EXTERNAL IGNITIONSNOITACIFICEPS08VEL001VEL511VEL021VEL.S.UcirteMmm.S.UcirteMmm.S.UcirteMmm.S.UcirteMmm)cc()³ni(tnemecalpsiD57.720.72

100* Check to detemine bore sizeNotes: (A) VH, HH50-70 models .003/.031 (.762/.787 mm) (B) VH, HH50-60 .0015/.005 (.038/.140 mm) (C) VH, HH70 .0038/

101SOLID STATE AND EXTERNAL IGNITION (Cont.)* Check to detemine bore sizeNotes: (A) VH, HH50-70 models .003/.031 (.762/.787 mm) (B) VH, HH50-60 .0015

102AVAILABLE TECHNICIAN'S HANDBOOKS692508Covers the diagnosis and repair of Tecumseh 2-cycleengines. Except the TC Engine and TVS840.692509Covers

103OIL SEAL DRIVERFLYWHEEL KNOCK-OFF TOOLNo. 670103 - Knock-off tool (right hand) (7/16").No. 670169 - Knock-off tool (right hand) (1/2").No

104VALVE LAPPING TOOLNo. 670154 Valve lapping tool.REBUSHING DRIVERSToolNumber Description Use with:A. 670158 Bearing Driver 7/8'’ (22.225 mm)Mai

105.016 = 1/64.031 = 1/32.047 = 3/64.063 = 1/16.078 = 5/64.094 = 3/32.109 = 7/64.125 = 1/8.141 = 9/64.156 = 5/32.172 = 11/64.188 = 3/16.203 = 13/64.21

7CHAPTER 3 CARBURETORS AND FUEL SYSTEMSGENERAL INFORMATIONTecumseh uses two basic types of carburetors, float and diaphragm type carburetors. Float ty

iSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman TecumsehUPDATED VERSION OF SEARS CRAFTSMAN CR

iiSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.243022 LAV30-30524K143.243042 LA

iiiSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.264432 ECV100-145099A143.264452

ivSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.276402 VM100-157014A143.276412 V

vSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.296012 VM80-150080F143.296022 VM1

viSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.326062 TVM195-150017H143.326072

viiSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.356202 TVM220-157089F143.356212

viiiSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.394432 ECV100-145343G143.39444

ixSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.434132 TVS115-61901143.434142 TV

xSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.628012 HH80-110056E143.628022 HH8

8OPERATIONIn the “CHOKE” or “START” position, the choke shutter is closed and the only air entering the engine enters throughopenings around the shut

xiSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.665042 HS50-67037C143.665052 HS5

xiiSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.716052 HM70-132007B143.716062 H

xiiiSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.784092 H30-35362S143.784102 H3

xivSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.945300 TVS120-63918K143.945300

xvSEARS CRAFTSMAN CROSS REFERENCE CHARTSCraftsman Tecumseh Craftsman TecumsehCraftsman Tecumseh Craftsman Tecumseh143.974014 TVS115-56094E143.974016 T

9FLOATCHOKESHUTTERTHROTTLESHUTTERIDLE AIRBLEEDINLET NEEDLEAND SEAT7IMPULSE FUEL PUMPSImpulse fuel pumps may either be mounted externallyonto the carb

10*NON METALLIC ITEMS - CAN BE DAMAGED BY HARSH CARBURETOR CLEANERSCheck ball is not serviceable onsome models.Remove adjustment screw. To adjust20° s

11CARBURETOR IDENTIFICATIONTecumseh has a variety of carburetors. To help identifythese carburetors here are some simple procedures tofollow.DUAL SYS

121718CAPPED FIXEDJET19MIXING WELLCAST BUT NOTMACHINED20IDLE JETCAST BUT NOTMACHINED21SERIES 6 CARBURETORS 4-CYCLESeries 6 carburetors are used on 2

13ENGINETROUBLESHOOTINGEngine Will Not StartCheck For SparkWet Check If Spark Plug Is Wet or Dry DryDefective Spark Plug Check Fuel Supply and FuelCap

14AIR SYSTEMPROBLEMSPlugged Air FilterLeaky CarburetorGasketThrottle or ChokeShafts WornChoke NotFunctioningProperlyPluggedAtmospheric VentAir BleedRe

15TESTING1. After repeated efforts to start the engine using the procedure listed in the operator’s manual fail, check for spark byremoving the high t

iC Tecumseh Products Company1998CONTENTSCHAPTER 1 GENERAL INFORMATION...

16PRE-SETS AND ADJUSTMENTS(TECUMSEH AND WALBROCARBURETORS)NOTE: OVERTIGHTENING WILL DAMAGE THE TAPERPORTION OF THE NEEDLE. All adjustments should bema

17DISASSEMBLY PROCEDURENOTE: Engines which are identified as compliant with CARB (California Air Resources Board) or EPA (USEnvironmental Protection A

188. Remove all welch plugs if cleaning the carburetor.Secure the carburetor in a vise equipped with protectivejaws. Use a small chisel sharpened to a

1939RIM11/64" (4.36 mm) DRILL BIT37Diaphragm Carburetors1. Remove the screws holding the diaphragm cover on.2. Remove the cover, gaskets, and di

20INSPECTIONAfter careful disassembly of the carburetor and the removal of all non metallic parts, the carburetor body and all othermetallic parts sho

21ASSEMBLYWelch PlugsTo install a new welch plug after cleaning the carburetor,secure the carburetor in a vise equipped with protectivejaws. Place the

22High and Low Speed Adjusting Screw, Main NozzleWhen reassembling, position the coil spring on the adjustingscrews, followed by the small brass washe

234. Install the hinge pin from the opposite hinge leg. Thebowl gasket must be positioned over the end of thespring (diag. 51).5. Set the proper float

245556Inlet Fuel FittingTo remove a leaking or damaged fuel inlet fitting, use a1/4"(6 mm) bolt, 1/4" (6 mm) nut and 1/4" (6 mm) washer

255857FLOAT TYPE CARBURETOR DIAPHRAGM TYPE CARBURETORLOW SPEEDADJUSTMENTSCREWHIGH SPEEDADJUSTMENTSCREWTHROTTLE LEVERAND SHAFTSPRINGWASHERSEALWASHERSPR

iiGOVERNOR GEAR AND SHAFT SERVICE... 28SPEED CONTROLS AN

26CHAPTER 4 GOVERNORS AND LINKAGEGENERAL INFORMATIONThis chapter includes governor assembly and linkage illustrations to aid in governor or speed cont

27ENGINE OVERSPEEDING1. If the engine runs wide open (faster than normal), shut the engine off immediately.2. Check the condition of the external gove

28GOVERNOR GEAR AND SHAFT SERVICEAfter the cylinder cover is removed from the engine, the governor spool, gear, or governor shaft can be removed. Ono

291. Loosen the two screws on the top of the panel.2. Move the control lever to full wide open throttle positionand install a wire or aligning pin thr

301415INCREASEDECREASEBEND AREAHIGH SPEEDADJUSTMENT TAB.040 - .070 (1.016 - 1.778 mm)GAP LOCATIONCHOKE ADJUSTINGTABCONTROLLEVERHIGH SPEEDPIN POSITIONG

31CONSTANT SPEED APPLICATIONS20HORIZONTAL LIGHTWEIGHT16HORIZONTAL MEDIUM FRAMESMALL FRAME1918HORIZONTAL SHAFT ENGINESIDLE SPEEDCRACK SCREWIDLE SPEEDCR

32SNOW KING ENGINES24TO INCREASE SPEED - CLOSE LOOPTO DECREASE SPEED - SPREAD LOOPSNOW KING ENGINES2322MEDIUM FRAMEHORIZONTAL SHAFT ENGINES (CONTINUED

33VERTICAL SHAFT ENGINESSTANDARD TVM ENGINE WITHOUT GOVERNOROVERRIDETVXL 220 WITH HORIZONTAL SPEED CONTROL3029TVS 115 ENGINE WITH "SNAP IN"S

34GOVERNOR OVERRIDE SYSTEM FORTVM170, 195 AND 220 ENGINESThis system will be found starting on 1985 productionmodels, and will not retrofit onto older

35CHAPTER 5 REWIND STARTERSGENERAL INFORMATIONRewind starters used on vertical shaft Tecumseh engines are top mount horizontal pull style or side moun

iiiTESTING PROCEDURE ... 6

36Standard rope lengths54" (16.5 meters) standard stamped steel starter61" (18.6 meters) vertical pull - horizontal engagementtype65" (

37ROPESTARTERHOUSINGHANDLEPULLEY AND REWINDSPRING ASSY.DOG SPRINGWASHERRETAINERSTARTER DOGBRAKE SPRINGWASHERSPRING PINBRAKE SPRINGSTARTER DOGRETAINERW

38Assembly1. If replacing the starter rope, see Step 8.Extreme caution should be used when workingwith springs. Always where appropriate safetyequipme

392. Place the pulley assembly into the starter housing.3. Install the brake spring, starter dog(s), and starterdog return spring(s). The starter dog

40worn or damaged parts.Assembly Procedure1. Insert the rope through the starter pulley.2. Assemble the gear, pulley, washer, and snap ring.3. Place a

41at the outer edge against the gear sheave.7. Remove the retainer pin from the strut and slowlyrelieve the spring tension by allowing the springcapsu

42CHAPTER 6 ELECTRICAL SYSTEMSGENERAL INFORMATIONThe electrical system consists of three main elements: a battery, a starting circuit, and a charging

43Current flows through a diode when the anode is more positive than the cathode. The cathode end of the diode shouldpoint toward the battery when dio

44WIRE GAUGE: The proper thickness of wire is necessaryin all electrical circuits. Wire diameter is measured inincrements of gauge numbers. As the gau

45BASIC CHECKSBefore going into extensive checks, be sure to perform the more basic checks first, such as:1. Battery defective or not charged.2. Corro

1CHAPTER 1 GENERAL INFORMATIONENGINE IDENTIFICATIONTecumseh engine model, specification, and serialnumbers or (date of manufacture, DOM) are stamped i

46Starter will notturnStarter turns atlow rpms orstalls under loadIs there powerat the powersource?Check wiring,connections,safety switches,starter sw

47Check diodes,replace if nocontinuity exists orif continuity existsreversing test leadsCheck fuses,replace asnecessaryCheck switches,wiring, or light

48TESTING PROCEDURE STARTING CIRCUIT1. Check the power source using an electrical tester and follow the testers recommended procedure. Make sure t

4918 Watt A.C. Lighting AlternatorModels: H35, HS & HSSK 40-50, HM &HMSK 70-80-100CHECKING THE SYSTEM: To check the system,disconnect the plug

50TEST NO. 2 - Connect the positive probe of meter to red output lead. Connect the negative probe of meter to both A.C.terminals and black output lead

51NOTE: ON OLDER POINT IGNITION SYSTEMS, THEA.C. OUTPUT LEADS ARE BLACK AND RED.3 Amp D.C. Alternator System - RectifierPanelThis 3 amp system is read

523 Amp DC Alternator System - Diode inHarness SleeveModels: H30-35, HS40, H50-60, HH50-60,HM70-80-100, HHM80This system has a diode included in the

53235 Amp Alternator System Regulator-RectifierUnder Blower HousingCHECKING THE SYSTEM: An open circuit D.C. voltagecheck cannot be made with this sy

54CHECKING THE SYSTEM: To check the system,disconnect the plug and measure the D.C. voltage at thered wire terminal (diag. 24). Measure the A.C. volta

557 Amp Alternator System Regulator-Rectifier Under Engine Block HousingModels: H50-60, HH50-60, HM70-80-100,HHM80, TVM125-140-170-195-220In this sy

2The number designations following the letters indicatethe horsepower or cubic inch displacement.The number following the model number is thespecifica

56With the engine running, minimum values should read:2500 R.P.M. - 16.0 Volts A.C.3000 R.P.M. - 19.0 Volts A.C.3600 R.P.M. - 24.0 Volts A.C.If the mi

5734SPRINGRETAINERCAP ASSY.35RETAINERRINGSPRINGGEARARMATUREDRIVE NUTSERVICEThis section covers the service procedures for the 12 and 120 volt electric

58INSPECTION AND REPAIR1. The pinion gear parts should be checked for damageor wear. If the gear does not engage or slips, it shouldbe washed in solve

59CHAPTER 7 FLYWHEEL BRAKE SYSTEMSGENERAL INFORMATIONTecumseh’s brake systems provide two methods of meeting compliance standards which has become a f

60OPERATION (CONTINUED)INSIDE EDGE SYSTEMIn the stop position the brake pad is applied to the inside edge of the flywheel, at the same time the igniti

61UNHOOK TORSION SPRING67SHORT END OF SPRINGSWITCHLEVER670298ALIGN HOLESGROUNDING CLIP89"E" CLIPGROUNDING CLIP POSITIONLINKAGEBRAKE PADSERVI

62MOUNTING HOLESSCREW END MUSTNOT BLOCK LEVERACTION131110ÔÔCABLE CLAMPSCREWSTOPMECHANISM FULL DOWNBEFORE SCREWS TORQUEDMACHINESCREWSSELF TAPPINGSCREW1

63 CHAPTER 8 IGNITIONGENERAL INFORMATIONThe ignition systems used on Tecumseh engines are either solid state capacitor discharge modules or magnetoign

64IDENTIFICATION OF TECUMSEH IGNITION SYSTEMSCOMPONENTS OF A TECUMSEH MAGNETOIGNITION SYSTEM (DIAG. 7)A. Flywheel with magnetsB. CoilC. CondenserD. Sp

65The condenser acts as an electrical shock absorber toprevent arcing between the contact points as they open.Arcing will lower the voltage at the spa

3ENGINE OILUse a clean, high quality detergent oil. Be sure original container is marked: A.P.I. service SF thru SJ. The use ofmultigrade oil may incr

66Check flywheel fordamaged or sheared keySet proper air gap onexternal coilSet proper point gap, checkcondensor and timingTestcoil for intermittent o

67TESTING PROCEDURE1. Check for spark using a commercially available sparktester and following the tester's recommendedprocedure.2. Check for the

68When reinstalling the plug make sure it is clean of all foreign material.NOTE: DO NOT USE A SAND BLASTER TO CLEAN PLUGS, MICROSCOPIC PARTICLES LEFT

69Begin the procedure by replacing the points if necessary.To do this remove the nut that secure the movable portionof the breaker points. Remove the

7030Before putting the dust cover back on the points box, cleanthe points by sliding lint free paper back and forth betweenthe contacts. Manually, ope

71323133Other Solid State SystemsThe following systems are located under the flywheel. Allcomponents are encapsulated into one module. No timingis nec

72CHAPTER 9 INTERNAL ENGINE AND CYLINDERGENERAL INFORMATIONThis chapter covers the cylinder block, piston and rod assemblies, cylinder head, crankshaf

73LUBRICATION SYSTEMSThe lubrication system used with all Tecumseh horizontalcrankshaft engines covered in this manual utilize a splashtype system. An

74COMPONENTSThe cylinder block houses the piston, valves and along with the cylinder cover all the internal components. The blockis a one piece diecas

75ENGINE OPERATION PROBLEMSOVERHEATSExcessive engine loadingLow oil level or wrong viscosity oilCooling air flow, obstructed orclogged cooling finsCar

45. When replacing the spark plug, consult the parts breakdown for the proper spark plug to be used in the enginebeing serviced. Set the spark plug ga

76ENGINE MISFIRESWrong or fouled spark plugCarburetor improperly adjustedValves sticking or not seating properlyIncorrect spark plug orIgnition timing

77TESTING ENGINE KNOCKS1. Check the blade hub, blade adapter, or crankshaft coupler for loose fit, loose bolts, or crankshaft key damage.Remove,

78 ENGINE VIBRATES EXCESSIVELY1. Check the engine crankshaft on the PTO end for bends using a straight edge, square or a dial indicator. Blades o

795. Check the engine valve lash. Reset the valves at the proper lash.6. Check the valves for proper seating and valve guide lash. Recondition the val

8014. Remove the internal components. Align the timingmarks on all engines except VM70, 80, 100, HHM80,HM70, 80, 100, TVM170, 195, 220 to relieve valv

81CYLINDERSVisually check the cylinder for broken or cracked fins or a scored cylinder bore. Check the main bearings for wear orscoring. If the main b

828175236424957184623BELLEVILLE WASHER (CROWN TOWARD BOLT HEAD)FLATWASHERTVM170,195,220,VM & HM MODEL ENGINES25ALL MODELS EXCEP

83Use a ring expander to remove and replace the rings. Donot spread the rings too wide or breakage will result.If the top compression ring has an insi

843637CRANKSHAFTS AND CAMSHAFTSInspect the crankshaft visually and with a micrometer forwear, scratching, scoring, or out of round condition. Checkfor

85VALVESThe valves should be checked for proper clearance,sealing, and wear. Valve condition is critical for properengine performance. Valve clearance

5GENERAL INFORMATIONThe air cleaner is the device used to eliminate dust anddirt from the air supply. Filtered air is necessary to assurethat abrasive

86Valve SeatsValve seats are not replaceable. If they are burned, pitted, or distorted they can be reground using a grinding stone or avalve seat cutt

87CYLINDER COVER, OIL SEAL, AND BEARING SERVICE Cylinder CoverThe following procedures, except oil seal replacement, require engine disassembly.

8855545251OIL SEALDRIVER 670272OIL SEALOIL SEAL REMOVERTOOL: POSITIONED FORREMOVAL OF OIL SEALOIL SEALOIL SEAL DRIVERPROTECTORBEARINGSPLITTERBALLBEARI

89565758COUNTERBALANCE SERVICETo correctly align the Ultra-Balance® system, rotate thepiston to top dead center (TDC) and insert thecounterbalance sha

90CHAPTER 10ENGINE SPECIFICATIONSThe engine specifications listed on the followingpages include tolerances that are consideredacceptable to achieve no

91FOUR CYCLE TORQUE SPECIFICATIONSThe torque specifications listed in this chart are to be used for replacing components after disassembly, not forche

92FOUR CYCLE TORQUE SPECIFICATIONS - CONTINUEDThe torque specifications listed in this chart are to be used for replacing components after disassembly

93ENGINE SPECIFICATIONS STANDARD POINT IGNITIONAll models have point setting of .020" (.508 mm), spark plug gap of .030" (.762 mm), valve se

94ENGINE SPECIFICATIONS STANDARD POINT IGNITION (CONT.)All models have point setting of .020" (.508 mm), spark plug gap of .030" (.762 mm),

95ENGINE SPECIFICATIONS STANDARD POINT IGNITION* Check to detemine bore sizeNotes: (A) VM & HM80 - Displacement 19.41 (318 cc) (B) VM & HM80