Data Sheet FP-321 Series Fuel Primer Version 2.1 The FP-321 Series makes priming the fuel system of a diesel engine easier, faster, and safer than manually priming during routine filter changes. It pumps fuel into the lines to purge trapped air in the main feed line, primary filters, secondary filters, and engine. The bypass protects the system from pressurizing beyond the preset. Basic Features • 22 psi pressure relief • Left-to-right flow or right-to-left flow • 24V • Momentary button with LED power indicator • Marine or industrial version Marine Version with white base and cover Optional Features • 12V special order • 15 psi pressure relief special order Technical Specifications Flow Rate Reverso Pumps, Inc. www.reversopumps.com | [email protected] | Ph: (954) 522-0882

It is recommended to install the fuel primer after the primary filter, but it can be located anywhere in the fuel system. The valve handle points with the direction of flow. Rotate valve handle to priming position. 3 Hold down button to run the pump. Once fuel appears at the filter, the lines are primed. [A Release button and return valve handle to run position before restarting engine. Right-to-Left Version Version: 4/17/19 Reverso Pumps, Inc. www.reversopumps.com | [email protected] | Ph: (954) 522-0882