3to 11hp 4-cycle l-head engines - Small Engine Suppliers

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ADJUSTING RPM ON MEDIUM FRAME VERTICAL SPEED CONTROL This speed control is adjusted by aligning the slot in the speed control lever with the alignment hole on the mounting bracket. Place a pin through the two holes, place the equipment throttle control to the wide open position, hook the bowden cable end in the control as shown, and tighten the cable housing clamp. In this position, the gap of .040" - .070" (1.016 - 1.778 mm) should exist at the gap location as illustrated. This will assure that the carburetor will go into full choke when the control is placed in the start position. HIGH SPEED ADJUSTMENT TAB TOOL 670326 GOVERNED IDLE SPEED SCREW GAP OF .040 - .070 (1.016 - 1.778 mm) HIGH SPEED PIN POSITION ADJUSTING GOVERNED/NON-GOVERNED DECREASE INCREASE 14 With the engine running at its lowest speed, set the governed idle at the designated RPM by adjusting the governed idle screw or bending the idle tab. Next set the non-governed idle by pushing the bottom of the governor lever away from the control brackets so the throttle lever contacts the idle speed crack screw (on the carburetor). Hold the lever in this position and turn the crack screw to 600 RPM below the governed idle speed. This setting prevents the throttle plate from closing off when going from high speed RPM to low speed RPM. If improperly adjusted, the engine could experience an over lean condition. The idle speed is adjusted by turning the idle speed screw clockwise to increase engine R.P.M. and counterclockwise to decrease R.P.M. Use tool part # 670326 to adjust the high speed engine R.P.M. Place the slotted end of the tool onto the adjustment tab and bend the tab to the left (toward the spark plug end) to increase engine R.P.M. (diag. 14). NOTE: Some <strong>engines</strong> use nylon bushings on the throttle and choke linkage hook-up points to extend the life of the linkage and to enhance the stability of the governor system. Make sure they are in good condition and in place. HIGH SPEED ADJUSTMENT TAB BEND AREA GOVERNED IDLE ADJUSTING SCREW .040 - .070 (1.016 - 1.778 mm) GAP LOCATION TOOL 670326 CHOKE ADJUSTING TAB CONTROL LEVER HIGH SPEED PIN POSITION DECREASE INCREASE 15 ADJUSTING RPM ON MEDIUM FRAME VERTICAL (up/down speed control) To adjust the high speed RPM on Medium Frame Vertical <strong>engines</strong>, move the control lever to the high speed pin position (align high speed pin holes in the speed control bracket). Place the slot on the straight end of tool (number 670326) onto the high speed adjustment tab as pictured. Rotate the bent end of the tool counterclockwise to increase RPM and clockwise to decrease RPM. (diag. 15). 30
HORIZONTAL SHAFT ENGINES IDLE SPEED CRACK SCREW IDLE SPEED CRACK SCREW HIGH SPEED RPM ADJUSTMENT SCREW HIGH SPEED RPM ADJUSTMENT SCREW HORIZONTAL LIGHTWEIGHT 16 LIGHTWEIGHT R.V. TYPE 17 IDLE SPEED CRACK SCREW HIGH SPEED RPM ADJUSTMENT SCREW IDLE MIXTURE SCREW MAIN MIXTURE SCREW SMALL FRAME 18 HIGH SPEED RPM ADJUSTMENT SCREW IDLE SPEED CRACK SCREW IDLE SPEED CRACK SCREW HORIZONTAL MEDIUM FRAME 19 HIGH SPEED RPM ADJUSTMENT SCREW CONSTANT SPEED APPLICATIONS 20 31
Page 1 and 2: TECUMSEH T E C H N I C I A N ' S H
Page 3 and 4: GOVERNOR GEAR AND SHAFT SERVICE....
Page 5 and 6: CHAPTER 1 GENERAL INFORMATION ENGIN
Page 7 and 8: ENGINE OIL Use a clean, high qualit
Page 9 and 10: GENERAL INFORMATION CHAPTER 2 AIR C
Page 11 and 12: CHAPTER 3 CARBURETORS AND FUEL SYST
Page 13 and 14: IMPULSE FUEL PUMPS Impulse fuel pum
Page 15 and 16: CARBURETOR IDENTIFICATION Tecumseh
Page 17 and 18: ENGINE TROUBLESHOOTING Engine Will
Page 19 and 20: TESTING 1. After repeated efforts t
Page 21 and 22: DISASSEMBLY PROCEDURE NOTE: Engines
Page 23 and 24: Diaphragm Carburetors 1. Remove the
Page 25 and 26: ASSEMBLY Welch Plugs To install a n
Page 27 and 28: 4. Install the hinge pin from the o
Page 29 and 30: Throttle Lever Remove the throttle
Page 31 and 32: ENGINE OVERSPEEDING 1. If the engin
Page 33: SPEED CONTROLS AND LINKAGE Many dif
Page 37 and 38: VERTICAL SHAFT ENGINES HIGH SPEED A
Page 39 and 40: GENERAL INFORMATION CHAPTER 5 REWIN
Page 41 and 42: CAUTION: THIS REWIND SPRING IS NOT
Page 43 and 44: 2. Place the pulley assembly into t
Page 45 and 46: at the outer edge against the gear
Page 47 and 48: CONVERTING ALTERNATING CURRENT TO D
Page 49 and 50: BASIC CHECKS Before going into exte
Page 51 and 52: TROUBLESHOOTING ELECTRICAL CHARGING
Page 53 and 54: 18 Watt A.C. Lighting Alternator Mo
Page 55 and 56: NOTE: ON OLDER POINT IGNITION SYSTE
Page 57 and 58: 5 Amp Alternator System Regulator-R
Page 59 and 60: 7 Amp Alternator System Regulator-
Page 61 and 62: SERVICE This section covers the ser
Page 63 and 64: CHAPTER 7 FLYWHEEL BRAKE SYSTEMS GE
Page 65 and 66: SERVICE If the brake system fails t
Page 67 and 68: CHAPTER 8 IGNITION GENERAL INFORMAT
Page 69 and 70: The condenser acts as an electrical
Page 71 and 72: TESTING PROCEDURE 1. Check for spar
Page 73 and 74: Begin the procedure by replacing th
Page 75 and 76: Other Solid State Systems The follo
Page 77 and 78: LUBRICATION SYSTEMS The lubrication
Page 79 and 80: ENGINE OPERATION PROBLEMS ENGINE KN
Page 81 and 82: TESTING ENGINE KNOCKS 1. Check the
Page 83 and 84: 5. Check the engine valve lash. Res
Page 85 and 86:
CYLINDERS Visually check the cylind
Page 87 and 88:
Use a ring expander to remove and r
Page 89 and 90:
VALVES The valves should be checked
Page 91 and 92:
Late production top mounted breathe
Page 93 and 94:
COUNTERBALANCE SERVICE To correctly
Page 95 and 96:
FOUR CYCLE TORQUE SPECIFICATIONS Th
Page 97 and 98:
ENGINE SPECIFICATIONS STANDARD POIN
Page 99 and 100:
ENGINE SPECIFICATIONS STANDARD POIN
Page 101 and 102:
SOLID STATE AND EXTERNAL IGNITION A
Page 103 and 104:
SOLID STATE AND EXTERNAL IGNITION A
Page 105 and 106:
SOLID STATE AND EXTERNAL IGNITION (
Page 107 and 108:
OIL SEAL DRIVER FLYWHEEL KNOCK-OFF
Page 109 and 110:
DECIMAL/FRACTION CONVERSIONS .016 =
Page 111 and 112:
SEARS CRAFTSMAN CROSS REFERENCE CHA
Page 113 and 114:
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3to 11hp 4-cycle l-head engines - Small Engine Suppliers

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