Mikuni DF44-227 Vacuum Diaphragm Fuel Pump for Universal Fit

Mikuni DF44-227 Vacuum Diaphragm Fuel Pump for Scooters and Go-Karts

The Mikuni DF44-227 is a vacuum-driven fuel pump built for small, carbureted engines. Its rectangular body moves fuel from the tank to the engine and works in scooters, minibikes, go-karts, and marine equipment. It is one of the carburetor and jet options for scooters best suited to setups where the fuel tank sits at or below engine level, such as the Icebear Maddog and Honda Ruckus.

Build and Design Details

The pump uses a vacuum-powered diaphragm, so it needs no wiring or electrical hookup. A brass fitting on the pump connects to the vacuum line, and molded arrows indicate the direction of fuel flow. Two mounting tabs hold the pump securely in position for steady performance in different conditions.

Signs It May Need Replacing

Poor fuel delivery or an engine that has trouble starting can mean the fuel pump needs attention. Keeping fuel flowing properly is essential to how the vehicle runs. Checking the pump periodically can help you avoid fuel starvation and related performance issues.

Specifications

• Overall Width: 67.5mm (with mounting brackets)
• Overall Height: 40.25mm (with brass fitting)
• Fuel Line Size: 1/4"
• Actuation: Vacuum
• OEM Part Number: DF44-227
• Fits: Universal vacuum fuel pump for carbureted small engines: GY6 and QMB139 scooters, Icebear Maddog

Compatibility

Compatible with:

• GY6 scooters (50-150cc, low-mounted fuel tank)
• QMB139 scooters (50cc, low-mounted fuel tank)
• Icebear Maddog (low-mounted fuel tank)
• Honda Ruckus-style scooters (low-mounted fuel tank)
• Carbureted small-displacement boats and go-karts (low-mounted tank)
• Evinrude and other small engines with 1/4" fuel lines

How to choose: Only use this pump when your fuel line measures 1/4" and the fuel tank is at or below engine height, because it operates on vacuum.

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