Fuel Regulator High Pre ssure 5 - 9 PSI 3/8in

The Specialty Products Company Fuel Regulator High Pressure 5–9 PSI 3/8in is a precision in-line fuel pressure regulator engineered for marine gasoline engines requiring steady, consistent fuel delivery across variable operating conditions. This aluminum-bodied regulator maintains fuel pressure within a 5 to 9 PSI range, making it ideal for smaller displacement outboards, inboard gasoline engines, and carbureted marine applications where precise pressure control directly impacts engine idle stability, acceleration response, and overall reliability on the water.

Built with 3/8-inch NPT inlet and outlet connections, this regulator integrates seamlessly into existing fuel line systems without requiring adapter fittings. The black powder-coat finish protects the aluminum housing from corrosion in salt air and humid marine environments—a critical consideration for offshore and coastal operations where fuel system degradation accelerates quickly. Weighing just 0.68 lbs and measuring 3.65 x 2.7 x 3.9 inches, the compact footprint fits easily in tight engine compartments. The 5–9 PSI operating range is optimized for traditional carburetor-fed engines that depend on lower pressure fuel delivery; higher pressures can damage carburetor float chambers and flood the engine during idle or low-load operation.

This regulator suits weekend fishermen running small recreational outboards, weekend cruisers with aging inboard gasoline engines, and restoration projects on classic boats where fuel system components need replacement. It addresses the common problem of fuel delivery inconsistency—surging during acceleration, stumbling at idle, or vapor lock conditions on hot days—by maintaining steady pressure regardless of fuel pump output variation or engine load changes. For any boater troubleshooting fuel delivery issues or rebuilding a carburetor fuel system, this Specialty Products Company regulator provides the reliable pressure control that carbureted engines demand.