Reverso Marine Fuel Primer FP-321 – Left to Right- 22 psi – 12V

Prime diesel fuel filters and bleed air from the system with the Reverso Marine Fuel Primer FP-321 – Left to Right- 22 psi – 12V. This 12V DC electric diesel fuel priming and air-bleeding pump is intended for diesel engine filter priming, air bleeding, and routine marine fuel-system service, with fixed left-to-right flow orientation.

The FP-321-12-LR delivers a nominal 30 GPH (114 LPH/0.5 GPM) flow rate and a maximum discharge pressure of 22.0 PSI (1.5 bar). Its corrosion-resistant cast brass body, stainless steel internal components, and intermittent-duty marine electric motor are specified for the listed priming application.

Fitment and Maintenance Use

The Reverso FP-321-12-LR is specified for diesel engine filter priming, air bleeding, and routine marine fuel-system servicing. It is a 12V DC pump with fixed left-to-right flow, so its electrical supply, fuel-line routing, and 1/4-inch NPT female port requirements must match the installation. Confirm fitment using the engine model, serial number, and manufacturer service documentation before ordering.

Before Ordering the Reverso FP-321

Confirm that Reverso Pumps part number FP-321-12-LR matches your marine diesel priming or air-bleeding application. Verify the 12V DC operating voltage, 30 GPH (114 LPH/0.5 GPM) nominal flow rate, 22.0 PSI (1.5 bar) maximum discharge pressure, fixed left-to-right flow direction, 1/4-inch NPT female ports, cast brass housing, stainless steel internal components, intermittent-duty motor, and 5.0 lb (2.3 kg) dry weight. Confirm compatibility with your engine manufacturer’s documentation before purchase.