All Holley Marine Carburetors
are designed to meet Coast Guard specifications. A marine Carburetors
fuel metering system is calibrated to compensate for unique engine loads found on boats. The J–style vent tubes direct spilt fuel/fumes back into the carburetor for safe operation while on rough waters.
Model 4175 Spread Bore; Electric Choke; Vacuum Secondary; Quadra–Jet Replacement