keimi FN401M Cordless Fuel Transfer Pump, 5 GPM, 51-Inch Hose

Why it’s worth it

A 51-inch hose gives the keimi FN401M room to reach around large tanks and recessed fill ports. This cordless electric fuel transfer pump is designed for select DeWalt 20V and Milwaukee 18V battery packs, making it a portable option for moving fuel to equipment without relying on a permanently installed, in-tank pump. Its transfer rate is up to 5 gallons per minute, and four adapters help connect it to many common fuel cans.

Use it for external transfers to trucks, tractors, generators, lawn mowers, motorcycles, ATVs, boats, RVs, and other equipment identified in the instructions. Would a trigger-controlled pump fit your setup better than a hand-operated siphon? The nozzle gives you direct control over when flow starts and stops.

Key points

The hand trigger is the main control: squeeze to transfer and release to stop the flow. This model does not use an automatic shut-off sensor, so keep the receiving tank in view and do not leave the pump unattended. The battery and charger are sold separately, confirm that your battery’s interface fits before use. DeWalt and Milwaukee are trademarks of their respective owners, keimi is not affiliated with either brand.

The pump is intended for gasoline, diesel, kerosene, and compatible light oils. To set it up, secure the adapter, fully insert the intake tube and nozzle, and operate in a ventilated area away from heat, sparks, and flames. Customer feedback includes positive comments about transfer performance, along with mixed reports about adapter fit and leaks and some concerns about durability. Seating the adapter securely and monitoring the receiving tank are practical parts of using this style of transfer pump.

Best use cases

Choose this format when you need a portable way to transfer fuel between a can and outdoor or vehicle equipment, rather than a replacement pump installed inside a tank. The cordless design suits work around tractors, generators, boats, and other equipment where a long hose can help reach the fill point. The four adapters add flexibility across many common fuel-can types, while the trigger lets you stop the flow by releasing it.

It suits you if you already have a compatible battery pack and want a dedicated external transfer tool for occasional equipment refueling. For a different approach, a hand-operated siphon uses manual pumping, the FN401M instead runs from a compatible battery and uses a hand-trigger nozzle for flow control. Follow the setup and safety directions for the equipment and fuel being handled.

What to clarify

Which batteries can power the pump? It is designed for select DeWalt 20V and Milwaukee 18V battery packs. Battery and charger are sold separately, and the battery interface needs to fit the pump.

How do you stop the fuel flow? Release the nozzle trigger to stop transferring. The pump has no automatic shut-off sensor, so keep the receiving tank in view while operating it.

What can it transfer fuel to? It is intended for external transfers of gasoline, diesel, kerosene, and compatible light oils to equipment such as trucks, tractors, generators, lawn mowers, motorcycles, ATVs, boats, and RVs. It is not an in-tank replacement pump.

Final verdict

The keimi FN401M brings battery-powered transfer, a 51-inch hose, four fuel-can adapters, and trigger-operated flow control together in one portable tool. It’s suited to equipment owners who need an external way to move specified fuels and have a compatible battery available for the job.