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Download TECUMSEH - 2-CYCLE ENGINES
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Contents Page GENERAL INFORMATION ...................................... 1 ENGINE IDENTIFICATION ................................... 1 INTERPRETATION OF MODEL NUMBER .......... 1 ENGINE CARE ......................................................... 2 SHORT BLOCKS .................................................. 2 STORAGE: ............................................................ 2 TUNE-UP PROCEDURE ...................................... 3 EXHAUST PORT CLEANING .............................. 3 2-CYCLE THEORY OF OPERATION ...................... 4 OPERATION OF PISTON PORT STYLE ............ 4 OPERATION OF REED PORTED STYLE WITH LOOP SCAVENGING .............................. 4 TERMS .................................................................. 4 EXHAUST OR SCAVENGE PHASE .................... 4 PORTS .................................................................. 4 EXHAUST PORTS ................................................ 4 THIRD PORT ........................................................ 4 REED VALVE ........................................................ 4 LUBRICATION ...................................................... 4 AIR CLEANERS, CARBURETORS, GOVERNORS AND LINKAGE ......................................................... 5 AIR CLEANERS .................................................... 5 POLYURETHANE-TYPE AIR CLEANER ............ 5 KLEEN-AIRE® SYSTEM ...................................... 5 PAPER-TYPE AIR CLEANER SERVICE ............. 5 GENERAL CARBURETOR INFORMATION ........... 6 CARBURETOR IDENTIFICATION ....................... 6 FLOAT-TYPE CARBURETORS ........................... 6 DIAPHRAGM (PRESSURE DIFFERENTIAL) CARBURETORS ................................................... 6 OPERATION .......................................................... 7 CARBURETOR SERVICE .................................... 7 THROTTLE ............................................................ 7 CHOKE .................................................................. 8 ADJUSTING SCREWS ......................................... 8 FUEL BOWL RETAINING NUT ............................ 8 CARBURETOR VENTING .................................... 8 HIGH TILT FLOAT STYLE .................................... 8 FUEL BOWL .......................................................... 8 FLOAT ................................................................... 8 INLET NEEDLE AND SEAT (FLOAT CARBURETORS) .............................................. 9 NEEDLE AND SEAT OPO-OFF TEST ................ 9 FLOAT HEIGHT SETTINGS ................................. 9 PRIMER BULB .................................................... 10 CLEANING CARBURETOR BODY .................... 10 DIAPHRAGMS .................................................... 10 INLET NEEDLE AND SEAT ............................... 11 FUEL INLET FITTING ......................................... 11 Page PRIMER BULB (DIAPHRAGM CARBURETOR) ................................................ 11 CARBURETOR CHECK VALVE ......................... 11 CARBURETOR SERVICE PROCEDURE ......... 12 EMISSIONIZED DIAPHRAGM CARBURETION 13 OUTBOARD CARBURETORS .............................. 13 OUTBOARD CONTROL PANEL ........................ 14 CARBURETOR ADJUSTMENTS .......................... 15 IDLE SPEED ADJUSTMENT ............................. 15 FLOAT TYPE-FIXED MAIN, IDLE ADJUST ...... 15 DIAPHRAGM - SINGLE AND DUAL ADJUSTMENT .................................................. 15 TROUBLESHOOTING CARBURETION ............... 16 FLOAT CARBURETOR CHECKS ...................... 16 CHECKS FOR DIAPHRAGM ............................. 16 STANDARD SERVICE CARBURETORS .............. 17 FUEL FITTING .................................................... 17 INLET FUEL FITTING ......................................... 17 CHOKE SHAFT ................................................... 17 THROTTLE LEVER ................................................ 17 IDLE SPEED ADJUSTMENT SCREW .................. 17 GOVERNORS AND LINKAGE .............................. 18 AIR VANE GOVERNORS ................................... 18 OPERATION ........................................................ 18 LINKAGE INSTALLATION ..................................... 18 REWIND STARTERS, ELECTRIC STARTERS AND ALTERNATORS ............................................. 20 REWIND STARTERS .......................................... 20 COMPONENTS ................................................... 20 ROPE SERVICE ................................................. 20 STYLIZED REWIND STARTER ......................... 21 VERTICAL PULL STARTER HORIZONTAL ENGAGEMENT TYPE ........................................ 22 STYLIZED REWIND STARTER WITH PLASTIC RETAINER ........................................................ 23 VERTICAL PULL STARTER, VERTICAL ENGAGEMENT TYPE ...................................... 24 REWIND STARTER MOUNTED IN HOUSING . 25 ELECTRIC STARTERS .......................................... 26 DRIVE ASSEMBLY SERVICE ............................ 26 STARTER CHECKING AND SERVICE ............. 27 CHECK FIELD ..................................................... 27 ARMATURE CHECK ........................................... 27 TROUBLESHOOTING STARTERS ....................... 27 ALTERNATORS ...................................................... 28 CHECKING THE SYSTEM ................................. 28 FLYWHEEL (INSIDE-EDGE) BRAKE SYSTEM ... 29 INSIDE EDGE SYSTEM ..................................... 29 COMPONENTS ................................................... 29 SERVICE ............................................................. 29 CONTROL CABLE .............................................. 30 Copyright © 1994 by Tecumseh Products Company All rights reserved. No part of this book may be reproduced or transmitted, in any form or by any means, electronic or mechanical, including photocopying, recording or by any information storage and retrieval system, without permission in writing from Tecumseh Products Company Training Department Manager. i
