GY6 QMB139 4-STROKE OHV SCOOTER ENGINE SERVICE REPAIR MANUAL
ENGINE COVERED:
49.5 cc 1-CYLINDER, 4-STROKE, AIR-COOLED, 139QMB ENGINE
CONTENTS:
GENERAL INFORMATION
TIGHTENING TORQUE
TROUBLESHOOTING
MAINTENANCE
ENGINE TOP END
LUBRICATION SYSTEM
FUEL SYSTEM
CARBURETOR SYSTEM
CYLINDER HEADS & VALVES
CYLINDER & PISTON
DISASSEMBLY & ASSEMBLY
DRIVE PULLEY & CLUTCH
TRANSMISSION SYSTEM
CRANKCASE-CRANKSHAFT
CHARGING SYSTEM
IGNITION SYSTEM
MAGNETO SYSTEM
STARTING SYSTEM
CIRCUIT DIAGRAM
This is a very comprehensive manual (DOWNLOAD in PDF format) for GY6 QMB139 4-STROKE OHV SCOOTER ENGINE, Features detailed exploded views. This is the same manual that technicians use to fix your engines. Manual covers detailed and complete step-by-step written procedures with pictures and diagrams, fully printable-selected pages or whole manual, illustrated. So, you will not be disappointed. This is the manual for Repairs, Maintenance & servicing.