Blue Line Fuel Level Sensor / Sending Unit: GY6/139QMB

Be Sense-able: OEM Fuel Level Sensor

Restore your dashboard's accuracy with the Blue Line Fuel Sending Unit. Specifically designed for GY6 50cc (139QMB) and 150cc (157QMJ) scooters, this fuel level sensor features the common 3-tab "twist-on" mounting interface. If your fuel gauge is stuck on empty or fluctuating wildly, a corroded or failed sending unit is the likely culprit. This OEM-spec replacement ensures your gauge reflects the true level of your tank, preventing unexpected "out-of-gas" breakdowns.

Technical Performance Features

• Precision Float Arm: Engineered with a high-sensitivity potentiometer to provide a smooth, linear resistance signal to your analog or digital fuel gauge.
• Twist-On 3-Tab Interface: Designed for modern Chinese-manufactured tanks that utilize a metal locking ring (sold separately) rather than traditional bolts.
• Fuel-Resistant Components: Features a high-density float and reinforced wiring harness designed to withstand long-term immersion in modern ethanol-blended gasoline.
• Plug-and-Play Wiring: Comes with a standard electrical connector for a seamless interface with your scooter's factory wiring harness.

Comprehensive Fitment Guide

This sending unit fits nearly all 50cc-150cc scooters using a twist-lock fuel tank port:

Technical Specifications

• Mounting Type: 3-Tab Twist Ring
• Compatibility: Chinese GY6-Based Scooters and 139QMB Scooters
• Material: Steel Arm / Synthetic Float
• Wiring: Multi-Pin Connector

Mechanic's Note: Fuel senders are incredibly sensitive. 

Fitment Warning: This unit is for the twist-on style ring. If your fuel tank has four bolts holding the sender down, you need SKU 1300-1158 instead.

SKU: 1300-1161, 1300-4100 Original ZNEN Part Number: 3780A-ALA6-9000
Vendor: BLUE LINE

Fuel sending unit for GY6 and 139QMB scooters. This sender has a twist-on ring with three tabs to keep it in place. For the 4 bolt fuel sender, see 1300-1158