Blue Line 3-Port Frame Mount Fuel Petcock Valve: GY6/QMB

Reliable Flow: Blue Line Vacuum-Operated 3-Port Fuel Valve Restore your engine's fuel delivery system with the Blue Line 3-Port Fuel Valve . Engineered as a direct OEM replacement for GY6 139QMB and 157QMJ engines, the vacuum-actuated petcock ensures that fuel only flows when the engine is running. This critical safety feature prevents carburetor flooding and engine oil contamination, making it a vital component for the longevity of your 50cc or 150cc scooter. Technical Performance Features Vacuum-Actuated Security: Automatically shuts off fuel flow when the engine stops, protecting your intake system from overflow and "hydro-locking." External Frame Mount: Specifically designed for scooters with frame-mounted fuel petcocks where the valve is secured via a single 6.5mm bolt hole. High-Flow Internal Diaphragm: Features a durable, fuel-resistant internal diaphragm that provides consistent pressure to the carburetor even under high-load conditions. OEM Equivalent Quality: Part of the Blue Line series, offering factory-standard fitment and performance at a fraction of the cost of boutique brand parts. Comprehensive Fitment Guide This 3-port valve is a universal fit for almost all Chinese-manufactured scooters with engine codes containing "QM" or "FM" : Engine Family Compatible Codes 50cc / 80cc (QMB) 139QMB, 139QMA, 1P39QMB, YN139QMB, BN139QMB, 147QMD 125cc / 150cc (QMJ) 157QMJ, 152QMI, 161QMK, JJ157QMJ, BN157QMJ, BN161QMK-A Popular Brands TaoTao, Wolf, Icebear, Peace Sports, ZNEN, Bintelli, Jonway Technical Specifications Port Count: 3 Ports (Fuel In, Fuel Out, Vacuum) Mounting: 6.5mm Bolt Hole Material: Corrosion-Resistant Zinc Alloy Cross-Ref: Original Parts For Scooters SKU 164-288 Mechanic's Note: If your scooter won't start or is leaking fuel into the airbox, a failed vacuum diaphragm is often the culprit. Installation Tip: Before installing, verify that your vacuum lines are crack-free; a vacuum leak will prevent this valve from opening. Fitment Note: If your scooter has 4 ports, you need SKU 164-84 instead. SKU: 1300-1156 Vendor: BLUE LINE