Blue Line 19mm CVK Carburetor w/ Accel Pump | 139QMB

Upgrade your 139QMB-powered 50cc scooter's fuel delivery with this Blue Line 19mm CVK replacement carburetor. The larger-than-stock 19mm venturi improves airflow and fuel atomization, while the mechanical float-bowl accelerator pump eliminates the bog and hesitation common when opening the throttle quickly. Fitted with an #85 main jet and electric choke. A direct-fit replacement for all 139QMB Chinese engines.

• Venturi: 19mm
• Electric choke: 2-pin male plug style
• Accelerator pump: mechanical float-bowl type
• Airbox side: ID 29mm / OD 38mm
• Engine side: ID 19mm / OD 28mm
• Main jet: #85 (4mm thread PB style)
• Pilot jet: #35 (6mm thread CV style)
• Needle: non-adjustable GY50 A4
• Compatible jets — main: JETKH1 | pilot: CV style | idle: #34

Compatible Engine Codes:

• 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD
• Other QMA and QMB variants — if your engine code includes "QM" or "FM" this carb is compatible

California Prop 65 Warning: www.p65warnings.ca.gov

• 19mm venturi — larger than stock for improved airflow and fuel atomization
• Mechanical float-bowl accelerator pump eliminates bog and hesitation
• Electric choke (2-pin male plug) for easy cold starting
• #85 main jet and non-adjustable GY50 A4 needle pre-installed
• Direct-fit replacement for all 139QMB / 139QMA 50cc 4-stroke engines

Venturi: 19mm | Choke: Electric (2-pin male) | Accel Pump: Yes | Airbox: ID 29mm / OD 38mm | Engine: ID 19mm / OD 28mm | Main Jet: #85 (PB 4mm) | Pilot Jet: #35 (CV 6mm) | Needle: GY50 A4 | SKU: 1100-1361

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