CONTENTS
Section Title Page
1. SPECIFICATIONS ....................................................................................................... 1
2. PERFORMANCE ........................................................................................................ 2
2-1 MAXIMUM OUTPUT ........................................................................................................ 2
2-2 CONTINUOUS RATED OUTPUT .................................................................................... 2
2-3 MAXIMUM TORQUE AND FUEL CONSUMPTION WITH MAXIMUM OUTPUT ............. 2
2-4 PERFORMANCE CURVES ............................................................................................. 3
3. FEATURES .................................................................................................................. 5
3-1 THE SMALLEST AND LIGHTEST 4-STROKE ENGINE IN THE MARKET ..................... 5
3-2 4-STROKE ENGINE ALLOWING OPERATION IN THE TILTED POSITION,
REQUIRED IN BRUSH CUTTING WORK AND OTHER SIMILAR APPLICATIONS ...................... 5
4. GENERAL DESCRIPTION OF ENGINE COMPONENTS .......................................... 8
4-1 CYLINDER BLOCK AND CRANKCASE .......................................................................... 8
4-2 CRANKSHAFT AND CONNECTING ROD ...................................................................... 8
4-3 PISTON ............................................................................................................................ 8
4-4 PISTON RINGS ............................................................................................................... 9
4-5 CAM GEAR ...................................................................................................................... 9
4-6 COOLING SYSTEM ......................................................................................................... 9
4-7 LUBRICATION SYSTEM ................................................................................................. 9
4-8 IGNITION SYSTEM ....................................................................................................... 10
4-9 CARBURETOR .............................................................................................................. 10
4-10 AIR CLEANER ............................................................................................................. 10
4-11 DECOMPRESSION SYSTEM ....................................................................................... 11
4-12 SECTIONAL VIEW OF ENGINE .................................................................................. 12
5. DISASSEMBLY AND REASSEMBLY ....................................................................... 14
5-1 PREPARATIONS AND SUGGESTIONS ........................................................................ 14
5-2 SPECIAL TOOLS ........................................................................................................... 14
5-3 DISASSEMBLY PROCEDURES .................................................................................... 14
5-4 REASSEMBLY PROCEDURES ..................................................................................... 26
6. MAGNETO ................................................................................................................ 41
6-1 FLYWHEEL MAGNETO ................................................................................................. 41
6-2 IGNITION OF MAGNETO .............................................................................................. 41
7. AUTOMATIC DECOMPRESSION SYSTEM ............................................................. 42
7-1 FUNCTION AND MECHANISM ..................................................................................... 42
7-2 INSPECTION ................................................................................................................. 42
