{"product_id":"blue-line-3-port-frame-mount-fuel-petcock-valve-gy6-qmb","title":"Blue Line 3-Port Frame Mount Fuel Petcock Valve: GY6\/QMB","description":"\u003cp\u003eReliable 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\u003c\/p\u003e","brand":"blue line","offers":[{"title":"Default Title","offer_id":48045328597179,"sku":"1300-1156","price":9.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0719\/1340\/6651\/files\/1300-1156_4e278b35-3b34-467c-893b-2b99932dd81d.jpg?v=1783057249","url":"https:\/\/thriftyscooters.com\/products\/blue-line-3-port-frame-mount-fuel-petcock-valve-gy6-qmb","provider":"Thrifty Scooters","version":"1.0","type":"link"}