User manual TECUMSEH HH100

[. . . ] TECUMSEH TECHNICIAN'S HANDBOOK This manual covers the following models: VH80, VH100, HH80, HH100, HH120, OH120-180 Model numbers are located on the engine shroud. Other illustrated Tecumseh 2-Cycle Engine, 4-Cycle Engine and Transmission manuals; booklets; and wall charts are available through Tecumseh. For complete listing write or call 8 TO 18 HP CAST IRON FOUR CYCLE ENGINES Contents Page CHAPTER 1. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Place head, with gasket surface down, on a piece of wood, 6 x 12 inches (152 X 304 mm). Remove the new guides from cold storage and install snap rings used for locating both valve guides. It may be necessary to use a rubber or rawhide mallet to fully seat the guides to the snap ring depths in the head. Allow head assembly to cool; recut both valve seats. HOT PLATE HEAT UNTIL OIL BEGINS TO SMOKE. CAUTION - When locating the drift punch on the guides be sure to center the punch. DO NOT allow the punch to make contact with the head when pressing out the guides. VALVE GUIDES 1/2" (12. 7 mm) FLAT DRIFT PUNCH CENTER PUNCH DRIFT ON VALVE GUIDE 30 SECTION 2. and larger engines (except valve-in-head engines), make sure surfaces are clean, then place new head gasket on cylinder and position head. Slide one belleville washer (crown toward bolt head) and one flat washer (sharp edge toward bolt head) over each bolt as shown in illustration. Insert the bolts in the head with the two shorter bolts in the position shown in the illustration. The two short bolts for positions 1 and 8 are 2'' long (50. 8 mm) and all other bolts are 2-1/4'' long (57. 15 mm). (22. 6 Nm) is attained in the following sequence: (See Figure) HEAD BOLTS TORQUE IN NUMERICAL ORDER BELLEVILLE WASHER CROWN SIDE UP FLAT WASHER FLAT WASHER (SHARP EDGE TOWARD BOLT HEAD) 2-1/4" (57. 15 mm) BOLTS 2 5 3 8 7 4 BELLEVILLE WASHER (CROWN TOWARD BOLT HEAD) 6 2' (50. 8 mm) BOLTS 1 9 HEAD ASSEMBLY, TORQUE SPECIFICATIONS. Run engine for 30 minutes, allow to cool until head is cool to the touch and then retorque the bolts in the same sequence as described. (All except number "1" (25. 4 mm) bolt which cannot be retorqued unless the rocker arm housing is removed. ) PUSH ROD TUBE "O" RINGS 1 1-3/8" (34. 925 mm) 4 1-3/4" (44. 45 mm) 6 1-3/4" (44. 45 mm) SPARK PLUG HOLE 3 1-3/4" (44. 45 mm) 1-3/8" (34. 925 mm) Run engine for 15 minutes, allow to cool and then retorque the bolts in the same sequence as described above. Slide one belleville washer (crown toward bolt head) and one flat washer (sharp edge toward bolt head) over each bolt as shown in illustration. Torque head bolts to 200 inch pounds (22. 6 Nm) in 50 inch pound (5. 6 Nm) increments. Note that head bolts marked 1 and 5 are 1-3/8'' long (34. 925 mm). Other bolts are 1-3/4'' long (44. 45 mm). 2 1-3/4" (44. 45 mm) 5 TORQUE IN NUMERICAL ORDER 31 SECTION 3. Install the breather with the drain holes toward the base of the engine. Overfilled with oil. FOR 8 HP AND LARGER (EXCEPT VALVE-IN-HEAD) DRAIN HOLES MUST BE TOWARD ENGINE BASE BREATHER BODY AND VALVE FOR VALVE-IN-HEAD ENGINES BREATHER BODY AND VALVE BREATHER TUBE TROUGH TO BE INSTALLED AWAY FROM CARB SIDE OF ENGINE 32 CHAPTER 5. Always remove ridge and carbon buildup before attempting to remove the piston and ring assembly from the cylinder. Make sure surfaces are clean, then place new head gasket on cylinder and position head. Always use a new head gasket if the cylinder head has been removed. POSSIBLE RIDGE BUILD UP AREA 2nd COMPRESSION RING RING GROOVE CHECK. Check the side clearance of the ring in the groove using a feeler gauge. [. . . ] & LARGER ENGINES (EXCEPT VALVE-IN-HEAD) INCH POUNDS Cylinder Head Bolts Connecting Rod Lock Nuts Mounting Flange or Cylinder Cover Flywheel Nut Spark Plug Carburetor to Cylinder Air Cleaner to Elbow Air Cleaner Bracket to Carburetor Tank Bracket to Housing Tank Bracket to Cylinder (5/16'' Lower) Tank Bracket to Head Bolt Starter-Top Mount Recoil Belt Guard to Blower Housing Flywheel Screen & Pulley Stationary Point Screw Blower Housing Baffle to Cylinder Blower Housing to Baffle or Cylinder Breaker Point Cover Magneto Stator Mounting Breather to Cylinder Oil Drain Plug 3/8 18 Blower Housing Extension to Cylinder Stub Shaft Bolts to Flywheel Motor Generator all Mounting Bolts NOTE: Divide by 12 for foot pounds. 70 NEWTON METER 20. 3 - 27. 1 9. 7 - 12. 4 11. 3 - 14. 7 67. 8 - 74. 6 24. 9 - 31. 6 8. 1 - 10. 9 1. 7 - 2. 8 1. 7 - 2. 8 4. 0 - 5. 7 17 - 22. 6 17 - 22. 6 4. 5 - 6. 8 2. 8 - 4. 0 8. 1 - 10. 9 1. 7 - 2. 3 8. 1 - 10. 9 5. 4 - 8. 1 1. 7 - 2. 8 8. 1 - 10. 9 2. 3 - 2. 8 9. 0 - 11. 3 8. 1 - 10. 9 11. 3 - 14. 1 7. 4 - 11. 3 180 - 240 86 - 110 100 - 130 600 - 660 220 - 280 72 - 96 15 - 25 15 - 25 35 - 50 150 - 200 150 - 200 40 - 60 25 - 35 72 - 96 15 - 20 72 - 96 48 - 72 15 - 25 72 - 96 20 - 25 80 - 100 72 - 96 100 - 125 65 - 100 SECTION 3. VALVE-IN-HEAD ENGINE SPECIFICATIONS Description Model OH120 Model OH140 U. S. Metric See Note Displacement Stroke Bore 21. 1 2. 75 3. 125 3. 126 . 030 . 005 . 010 46° . 042 . 052 45° + . 094 . 06 1. 915 . 312 . 313 1. 3750 1. 3755 1. 3765 1. 067 1. 321 45o 2. 388 1. 524 48. 641 7. 925 7. 950 34. 925 34. 938 34. 963 346 cc 69. 80 79. 375 79. 400 . 762 . 0127 . 254 23. 7 2. 75 3. 312 3. 313 . 030 . 005 . 010 46° . 042 . 052 45° + . 133 . 06 1. 980 . 312 . 313 1. 3750 1. 3755 1. 3765 1. 067 1. 321 45o 3. 378 1. 524 50. 292 7. 925 7. 950 34. 925 34. 938 34. 963 388 cc 69. 80 84. 125 84. 150 . 762 . 0127 . 254 See Note 27. 66 2. 875 3. 500 3. 501 . 030 . 005 . 010 46° . 042 . 052 45° + . 133 . 06 1. 980 . 312 . 313 1. 3750 1. 3755 1. 3765 1. 067 1. 321 45o 3. 378 1. 524 50. 292 7. 925 7. 950 34. 925 34. 938 34. 963 453 cc 69. 80 88. 900 88. 925 . 762 . 0127 . 254 See Note 27. 66 2. 875 3. 500 3. 501 . 030 . 005 . 010 46° . 042 . 052 45° + . 133 . 06 1. 980 . 312 . 313 1. 3750 1. 3755 1. 3765 1. 067 1. 321 45o 3. 378 1. 524 50. 292 7. 925 7. 950 34. 925 34. 938 34. 963 453 cc 69. 80 88. 900 88. 925 . 762 . 0127 . 254 30. 0 2. 875 3. 625 3. 626 . 030 . 005 . 010 46° . 042 . 052 45° + . 133 . 06 1. 980 . 312 . 313 1. 3750 1. 3755 1. 3765 1. 067 1. 321 45o 3. 378 1. 524 50. 292 7. 925 7. 950 34. 925 34. 938 34. 963 492 cc 69. 80 92. 075 92. 100 . 762 . 0127 . 254 Spark Plug Gap Valve Clearance Intake Exhaust Valve Seat Angle Valve Seat Width Valve Face Angle Valve Face Width Valve Lip Width Valve Spring Free Length Valve Guides STD Diameter Dia. for Roller Bearings Crankshaft End Play 1. 1865 1. 1870 30. 137 30. 150 1. 1865 1. 1870 30. 137 30. 150 1. 1865 1. 1870 30. 137 30. 150 1. 1865 1. 1870 *None . 001 . 007 Preload 3. 4950 3. 4970 . 6876 . 6880 . 0950 . 0960 . 1880 . 1890 30. 137 30. 150 1. 1865 30. 137 1. 1870 30. 150 *None . 001 . 025 . 007 . 178 Preload 3. 620 3. 622 . 7810 . 7812 . 0955 . 0965 . 1880 . 1895 4. 775 4. 826 91. 948 91. 999 *None . 001 . 025 . 007 . 178 Preload 3. 121 3. 123 . 6876 . 6880 . 0950 . 0960 . 1880 . 1900 79. 273 79. 324 17. 465 17. 475 2. 413 2. 438 4. 775 4. 826 *None . 001 . 025 . 007 . 178 Preload 3. 3080 3. 3100 . 6876 . 6880 . 0950 . 0960 . 1880 . 1900 84. 023 84. 074 17. 465 17. 475 2. 413 2. 438 4. 775 4. 826 *None . 001 . 025 . 007 . 178 Preload 3. 4950 3. 4970 . 6876 . 6880 . 0950 . 0960 . 1880 . 1890 88. 773 88. 824 17. 465 17. 475 2. 413 2. 438 4. 775 4. 826 . 025 . 178 Piston Skirt Diameter 88. 773 88. 824 17. 465 17. 475 2. 413 2. 438 4. 775 4. 826 Piston Pin Diameter Width Comp. 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