Overview
HFP-514 is a premium OEM replacement electric marine fuel pump engineered to restore precise low-pressure fuel supply and volume delivery to MerCruiser inboard and sterndrive engines. Serving as a direct physical and functional replacement for factory part numbers 861155A3, 861155A2, 861155A6, 861156A3, 805656A2, 18-7326, and 18-8868, this high-output inline electric pump module feeds fuel directly from the boat's fuel cell to the secondary high-pressure pump or vapor separator tank (VST). It features extensive fitment compatibility across MerCruiser V6 and V8 marine propulsion systems—including the 4.3L V6, 5.0L V8, and 5.7L V8 (350 MAG) series across serial number ranges 0L002003 through 1A063240 and up. It systematically resolves critical marine fueling issues caused by extended off-season storage, fuel phase separation, or electric motor failure, such as engine bogging under heavy acceleration, vapor lock, hard starting, mid-range throttle hesitation, lean misfires, and loss of top-end power on the water.
Marine engines operate under continuous heavy load, high ambient engine bay temperatures, and harsh moisture environments. Extended seasonal layups often allow water condensation to form inside the boat's fuel tank, causing ethanol-blended fuels to separate into water-rich layers. This leads to internal rust scale, varnish accumulation, and severe chemical degradation that seizes the pump motor armature. Operating a heavy marine engine with a failing low-pressure pump leads to fuel starvation in the high-pressure loop, causing dangerous lean air-fuel conditions that risk engine overheating or severe valve and piston damage.
HFP-514 cures these fuel delivery restrictions by providing a steady, uninterrupted flow of fuel to the high-pressure injection circuit. Constructed with a heavy-duty, marine-coated housing, it resists saltwater corrosion, humidity, and chemical breakdown from fuel additives. All primary internal seals, check valves, and internal pathways utilize high-performance synthetic rubber materials, offering total defense against swelling, hardening, or cracking when continuously exposed to modern pump gas, winterizing fuel stabilizers, and ethanol-blended marine fuels.
Features & Benefits:
- Restores Reliable Low-Pressure Delivery: Ensures steady fuel feed volume to prevent cavitation and fuel starvation in the secondary high-pressure injection circuit.
- Marine-Grade Synthetic Rubber Seals: Internal seals and check valves are molded from premium industrial-grade FKM to resist ethanol degradation and harsh marine environments.
- Corrosion-Resistant Exterior Housing: Features a heavy-duty encapsulated body coated to withstand continuous moisture, salt air, and marine engine bay environments.
- Quiet & Efficient Motor Architecture: Utilizes a balanced internal impeller mechanism that operates quietly while drawing low electrical current to minimize fuel heat-soak.
- Exact Factory Drop-In Replacement: Dimensioned with correct inlet and outlet fittings to match original MerCruiser mounting brackets and fuel line connections without modification.
- Cost-Effective Marine Repair Solution: Replaces only the failed low-pressure fuel pump, providing a professional-grade alternative to buying an expensive complete assembly from a marine dealer.
THE IDEAL REPLACEMENT FOR OEM #: 861155A3, 935432, 18-7326, 18-8868, 805656A2, 861155a2, 861155A6, 861156A3, 86115A6, E11003, E11004, 861155A2
Package Includes: Fuel Pump
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
