SKU: SPC3162C
MPN: 3162C
The Fuel Regulator High Pressure 5-9 PSI 3/8in NPT is an essential inline fuel system component designed for boaters, engine builders, and marine mechanics who demand precision fuel delivery under variable operating conditions. Whether you're running a performance outboard, inboard engine, or custom fuel-injected marine power plant, this regulator stabilizes fuel pressure within a critical 5 to 9 psi operating window—the sweet spot for most carbureted and early fuel-injection marine engines. Properly regulated fuel pressure is non-negotiable for consistent throttle response, smooth idle quality, and reliable cold-start performance on the water.
Built from aircraft-grade aluminum with a chrome-plated finish, this inline regulator resists corrosion in the salt-spray environment that every serious boater knows too well. The 3/8 inch NPT (National Pipe Thread) inlet and outlet ports accept standard marine fuel hose fittings, making installation straightforward on existing fuel rails or custom fuel lines. The internal bypass valve automatically bleeds excess fuel back to the tank whenever system pressure exceeds the 9 psi ceiling, protecting carburetors from flooding and preventing vapor lock during idle or low-demand cruising. This passive regulation requires no electrical input, ensuring bulletproof reliability when electronics aren't an option.
This regulator suits restoration projects, vintage engine swaps, and any marine application where carbureted or low-pressure fuel-injected systems demand stable, moderate fuel delivery. Compact dimensions (3.55 x 2.5 x 4.3 inches) allow installation in tight engine bays or fuel compartments without requiring extensive rework. Boaters upgrading from failing factory regulators or converting older carbureted engines to modern fuel systems will appreciate the straightforward 3/8 NPT threading—compatible with standard stainless steel fuel hose, braided AN fittings, and traditional marine fuel line adapters. Weighing just 0.63 lbs, it adds negligible weight while eliminating guesswork from fuel pressure tuning.
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