2-1/16 PC Marine Gauge Vac/Boost 30HG/20PSI

The 2-1/16 PC Marine Gauge Vac/Boost 30HG/20PSI is a dual-function instrument panel gauge designed for serious boaters, mechanics, and marine technicians who need reliable vacuum and boost pressure monitoring. This compact gauge serves as an essential diagnostic tool for marine engines, fuel systems, and supercharger installations where precise pressure readings determine engine performance and system health. Whether you're running a high-performance inboard, troubleshooting fuel injection concerns, or monitoring turbo or supercharger boost levels, this instrument delivers the accuracy you need to keep your vessel operating at peak efficiency on the water.

Built with a 2-1/16-inch polycarbonate face, this gauge combines durability with clear visibility in bright sunlight and varied lighting conditions common to the marine environment. The dual-range design measures both vacuum (up to 30 inches of mercury, ideal for fuel pump and carburetor diagnostics) and boost pressure (0–20 PSI, essential for supercharged or turbocharged applications), making it a versatile single-instrument solution. The robust polycarbonate lens resists impacts, salt spray corrosion, and UV degradation, ensuring longevity in the harsh marine setting. Its compact 4.5 x 4.5 x 4.75-inch footprint and lightweight 0.5-pound design allow flexible dashboard, helm console, or engine compartment installation without adding bulk or weight penalty.

Experienced marine mechanics and performance boaters rely on this gauge for real-time system monitoring and accurate troubleshooting. It integrates seamlessly into existing electrical systems and pairs with standard vacuum and boost hose connections, making retrofit or new-build installation straightforward. Anglers with fuel-injected power plants benefit from vacuum monitoring to detect fuel delivery faults before they strand you offshore, while performance enthusiasts use boost readings to optimize supercharger tuning and detect system leaks under load. This gauge suits inboard, outboard, and sterndrive applications across freshwater and saltwater fleets.