Fuel Sending Unit - 4 Bolt for & GY6 50cc (139QMB)

Fuel Sending Unit for GY6 50cc and 125/150cc Engines

This fuel sender is made for GY6 50cc and 125/150cc engines, with a focus on models using the 139QMB and 157QMJ designs. A 3-pin plug and a full wiring harness come with it, so installation is simple. The package includes a float arm, a float, a mounting gasket plate, and a retaining ring. You'll find it listed among our GY6 50cc scooter parts, and it's intended to give you a dependable fuel level reading in the tank.

Build and Fit Details

This is a 4-bolt fuel level sender designed as an OEM-equivalent replacement. It's made to connect correctly with several engine types so it works as intended. The distance between the mounting holes is 45mm (1.75 inches), which lets it seat properly on compatible vehicles.

Wiring Dimensions

Measured with the clip, the wire runs 19.5 inches, and the float wire is 5 inches long. These lengths give you some room to route the wiring during installation. With the wiring connected correctly, the fuel gauge should read accurately so you can track your fuel level.

Specifications

• Connector: 3-pin
• Wire Length (with clip): 19.5 inches
• Float Wire Length: 5 inches
• Mounting Hole Distance: 45mm (1.75 inches)
• OEM Part Number: 151-193
• Fits: GY6 125/150cc and 139QMB 50/80cc engines (4-bolt sender)

Compatibility

Fits:

• GY6 125cc and 150cc engines (157QMJ-based, 161QMK, 152QMI, and others coded QMJ, QMK or QMI)
• 139QMB 50cc and 80cc engines (139QMA, 139QMB, 1P39QMB, 147QMD, and others coded QMA or QMB)

Choosing the right one: Check the engine code stamped on the engine case or on its label. Codes containing "QM" or "FM" are the ones this sender is designed for.

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