Tecumseh HH60 User Manual

i
C Tecumseh Products Company
1998
CONTENTS
CHAPTER 1 GENERAL INFORMATION........................................................................................................ 1
ENGINE IDENTIFICATION.............................................................................................................................. 1
INTERPRETATION OF MODEL NUMBER...................................................................................................... 1
SHORT BLOCKS............................................................................................................................................. 2
FUEL................................................................................................................................................................ 2
ENGINE OIL .................................................................................................................................................... 3
TUNE-UP PROCEDURE ................................................................................................................................. 3
STORAGE........................................................................................................................................................ 4
CHAPTER 2 AIR CLEANERS ....................................................................................................................... 5
GENERAL INFORMATION .............................................................................................................................. 5
OPERATION .................................................................................................................................................... 5
COMPONENTS ............................................................................................................................................... 5
TROUBLESHOOTING OR TESTING.............................................................................................................. 5
SERVICE ......................................................................................................................................................... 6
DISASSEMBLY PROCEDURE........................................................................................................................ 6
POLYURETHANE-TYPE FILTER ELEMENT .................................................................................................. 6
PAPER-TYPE FILTER ELEMENT ................................................................................................................... 6
CHAPTER 3 CARBURETORS AND FUEL SYSTEMS .................................................................................. 7
GENERAL INFORMATION .............................................................................................................................. 7
OPERATION .................................................................................................................................................... 8
FUEL PRIMERS............................................................................................................................................... 8
IMPULSE FUEL PUMPS ................................................................................................................................. 9
FLOAT STYLE CARBURETORS..................................................................................................................... 9
DIAPHRAGM (PRESSURE DIFFERENTIAL) CARBURETORS..................................................................... 9
COMPONENTS ............................................................................................................................................. 10
CARBURETOR IDENTIFICATION ................................................................................................................ 11
DUAL SYSTEM CARBURETORS ................................................................................................................. 11
SERIES 1 CARBURETORS .......................................................................................................................... 11
SERIES 3 & 4 CARBURETORS.................................................................................................................... 11
DIAPHRAGM CARBURETORS..................................................................................................................... 11
SERIES 6 CARBURETORS 4-CYCLE.......................................................................................................... 12
SERIES 8....................................................................................................................................................... 12
SERIES 9....................................................................................................................................................... 12
SERIES 10 (EMISSION)................................................................................................................................ 12
NON-TECUMSEH CARBURETORS -- DELLORTO CARBURETOR.......................................................... 12
ENGINE TROUBLESHOOTING CHART....................................................................................................... 13
CARBURETION TROUBLESHOOTING CHART .......................................................................................... 14
TESTING ....................................................................................................................................................... 15
SERVICE ....................................................................................................................................................... 15
CARBURETOR PRE-SETS AND ADJUSTMENTS ...................................................................................... 15
FINAL ADJUSTMENTS (NON-EMISSION ENGINES).................................................................................. 16
NON-ADJUSTABLE CARBURETOR............................................................................................................. 16
DISASSEMBLY PROCEDURE...................................................................................................................... 17
FLOAT STYLE CARBURETORS................................................................................................................... 17
DIAPHRAGM CARBURETORS..................................................................................................................... 19
FLOAT ADJUSTING PROCEDURE .............................................................................................................. 19
INSPECTION ................................................................................................................................................. 20
ASSEMBLY .................................................................................................................................................... 21
STANDARD SERVICE CARBURETORS ...................................................................................................... 24
CHAPTER 4 GOVERNORS AND LINKAGE ................................................................................................ 26
GENERAL INFORMATION ............................................................................................................................ 26
OPERATION .................................................................................................................................................. 26
INTERNAL COMPONENTS (VARIOUS STYLES) ........................................................................................ 26
TROUBLESHOOTING................................................................................................................................... 26
ENGINE OVERSPEEDING ........................................................................................................................... 27
ENGINE SURGING ....................................................................................................................................... 27
SERVICE ....................................................................................................................................................... 27
GOVERNOR ADJUSTMENT......................................................................................................................... 27
GOVERNOR ADJUSTMENT PROCEDURE FOR SHORT BLOCK INSTALLATIONS................................. 27

Tecumseh HH60 Specifications

General

Fuel Type	Gasoline
Cooling System	Air-cooled
Compression Ratio	6.5:1
Lubrication System	Splash
Oil Capacity	20 oz (0.6 L)
Gap	0.030 in (0.76 mm)
Governor Type	Mechanical
Power	3.5 hp at 3600 rpm
Ignition System	Magneto
Spark Plug	Champion
Carburetor	Float type
Starting System	Recoil
Rotation	Counterclockwise (from PTO side)
PTO Shaft Diameter	0.75 in (19 mm)
Engine Type	4-cycle, L-head