Tecumseh HHM80 Technician's Handbook

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
SERIES 11 ...................................................................................................................................................12
SERIES 11 BRIDGED ..................................................................................................................................13
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

Tecumseh HHM80 Specifications

General

Brand	Tecumseh
Model	HHM80
Category	Engine
Language	English