Craftsman 143.991200 Specifications download pdf (Page 2)

CONTENTS

C Tecumseh Products Company

1998

Page

CHAPTER 1 GENERAL INFORMATION ....................... 1

ENGINE IDENTIFICATION ............................................. 1

INTERPRETATION OF MODEL NUMBER ..................... 1

SHORT BLOCKS............................................................. 2

FUELS ............................................................................. 2

ENGINE OIL .................................................................... 2

CAPACITIES.................................................................... 2

OIL CHANGE INTERVALS .............................................. 3

OIL CHECK...................................................................... 3

OIL CHANGE PROCEDURE .......................................... 3

TUNE-UP PROCEDURE ................................................. 3

STORAGE ....................................................................... 4

DRAINING THE FUEL SYSTEM ..................................... 4

OIL CYLINDER BORE .................................................... 4

CHAPTER 2 AIR CLEANERS ....................................... 5

GENERAL INFORMATION ............................................. 5

OPERATION .................................................................... 5

COMPONENTS ............................................................... 5

TROUBLESHOOTING OR TESTING ............................. 6

SERVICE ......................................................................... 6

DISASSEMBLY PROCEDURE ....................................... 6

POLYURETHANE-TYPE FILTER ELEMENT

OR PRE-CLEANER..................................................... 7

PAPER -TYPE FILTER ELEMENT ................................. 7

FLOCKED SCREEN........................................................ 7

CHAPTER 3 CARBURETORS AND FUEL SYSTEMS . 8

GENERAL INFORMATION ............................................. 8

OPERATION .................................................................... 8

FUEL PRIMERS .............................................................. 9

IMPULSE FUEL PUMPS ................................................. 9

FLOAT STYLE CARBURETORS .................................... 9

CARBURETOR VISUAL IDENTIFICATION .................... 10

SERIES I CARBURETORS ............................................. 10

SERIES III & SERIES IV CARBURETORS .................... 10

SERIES VI CARBURETORS .......................................... 10

SERIES VII ...................................................................... 10

SERIES VIII ..................................................................... 11

SERIES IX ....................................................................... 11

WALBRO MODEL LMK ................................................... 11

TESTING ......................................................................... 12

SERVICE ......................................................................... 12

CARBURETOR PRE-SETS AND ADJUSTMENTS........ 12

PRE-SETS AND ADJUSTMENTS

(TECUMSEH AND WALBRO CARBURETORS) ......... 13

FINAL ADJUSTMENTS ................................................... 13

TECUMSEH CARBURETORS ........................................ 13

WALBRO CARBURETOR ............................................... 13

CARBURETOR DISASSEMBLY PROCEDURE ............. 14

IMPULSE FUEL PUMP ................................................... 15

FLOAT ADJUSTING PROCEDURE................................ 16

INSPECTION ................................................................... 16

THROTTLE AND CHOKE ............................................... 16

IDLE AND HIGH SPEED MIXTURE ADJUSTING

SCREW ........................................................................ 16

FUEL BOWL RETAINING NUT ....................................... 16

FUEL BOWL, FLOAT, NEEDLE AND SEAT ................... 17

ASSEMBLY PROCEDURE ............................................. 18

WELCH PLUGS............................................................... 18

THROTTLE SHAFT AND PLATE .................................... 18

CHOKE SHAFT AND PLATE .......................................... 19

FUEL INLET FITTING ..................................................... 19

HIGH AND LOW SPEED ADJUSTING SCREW,

MAIN NOZZLE ............................................................. 19

INLET NEEDLE AND SEAT ............................................ 20

FLOAT INSTALLATION ................................................... 20

FUEL BOWL AND BOWL NUT ....................................... 21

IMPULSE FUEL PUMP ................................................... 21

PRIMER BULB ................................................................ 21

FINAL CHECKS............................................................... 21

CHAPTER 4 GOVERNORS AND LINKAGE ................. 22

GENERAL INFORMATION ............................................. 22

OPERATION .................................................................... 22

TROUBLESHOOTING .................................................... 22

ENGINE OVERSPEEDING ............................................. 22

ENGINE SURGING ......................................................... 22

SERVICE ......................................................................... 23

GOVERNOR ADJUSTMENT .......................................... 23

GOVERNOR GEAR AND SHAFT SERVICE .................. 23

GOVERNOR GEAR OR SHAFT REPLACEMENT,

UPSET STYLE GOVERNOR SHAFT .......................... 23

GOVERNOR SHAFT REPLACEMENT, RETAINING

RING STYLE ................................................................ 24

SPEED CONTROLS AND LINKAGE .............................. 25

CONVERSION TO REMOTE CONTROL ....................... 27

OVM, OVXL, OHV VERTICAL SPEED CONTROL ........ 28

OHV 11-17 HORIZONTAL SPEED CONTROL............... 28

CHAPTER 5 RECOIL STARTERS ................................. 29

GENERAL INFORMATION ............................................. 29

OPERATION .................................................................... 29

COMPONENTS ............................................................... 29

SERVICE ......................................................................... 29

ROPE SERVICE .............................................................. 29

ROPE RETAINER REPLACEMENT ............................... 30

STYLIZED REWIND STARTER (OHH, OVRM, OHM,

OHSK, OVM, OVXL, OHV 11-13), AND STAMPED

STEEL STARTER ......................................................... 30

DISASSEMBLY PROCEDURE ....................................... 30

ASSEMBLY PROCEDURE ............................................. 31

STYLIZED REWIND STARTER WITH PLASTIC

RETAINER .................................................................... 31

DISASSEMBLY PROCEDURE ....................................... 31

ASSEMBLY ...................................................................... 32

KEEPER SPRING STYLE STARTERS .......................... 32

DISASSEMBLY PROCEDURE ....................................... 32

ASSEMBLY PROCEDURE ............................................. 33

STYLIZED STARTER (OHV 13.5 -17) ............................ 34

ASSEMBLY ...................................................................... 34

CHAPTER 6 ELECTRICAL SYSTEMS .......................... 35

GENERAL INFORMATION ............................................. 35

OPERATION .................................................................... 35

STARTING CIRCUIT AND ELECTRIC STARTERS ....... 35

CHARGING CIRCUIT ...................................................... 35

CONVERTING ALTERNATING CURRENT TO

DIRECT CURRENT ...................................................... 36

HALF WAVE RECTIFIER SINGLE DIODE ..................... 36

FULL WAVE RECTIFIER BRIDGE RECTIFIER ............. 36

COMPONENTS ............................................................... 36

BATTERY......................................................................... 36

WIRING............................................................................ 36

ELECTRICAL TERMS ..................................................... 37

BASIC CHECKS .............................................................. 37

TROUBLESHOOTING ELECTRICAL STARTER

CIRCUIT FLOW CHART .............................................. 38

TROUBLESHOOTING ELECTRICAL CHARGING

CIRCUIT FLOW CHART .............................................. 39

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