Electric Fuel Pump Assembly FIT for Volvo Penta 4.3 5.0 5.7 GXi Gi OSi Marine Engines, Replace 21608511 3861355 3860210, High & Low Pressure EFI Fuel Pump

Specifications

• FIT for Volvo Penta 4.3L, 5.0L, and 5.7L marine engines, including 4.3GXi, 4.3OSi, 5.0GXi, 5.0OSi, 5.7Gi, 5.7GXi, and 5.7OSi models. This integrated electric fuel pump assembly is a direct replacement for OE part numbers 21608511, 3861355, 3860210, and 21545138. Please verify your engine's fuel injection type (EFI/MPFI) before purchase.
• Engineered as a dual-stage high and low pressure unit to maintain consistent fuel delivery across the entire RPM range. This marine fuel pump assembly features ethanol-tolerant internal seals and a corrosion-resistant housing specifically designed for saltwater environments. Every unit undergoes 100% flow and pressure testing to ensure it meets factory specifications for EFI performance.
• Designed to resolve common marine engine symptoms such as vapor lock, engine hesitation under load, and hard starting issues. This fuel pump kit restores the precise fuel pressure balance required for smooth idling and optimal throttle response. The internal cooling architecture prevents overheating during extended operation in enclosed engine compartments.
• Equipped with an OE-style 4-pin electrical connector and precision-threaded fuel ports for a leak-free interface. The assembly includes pre-installed Viton O-rings that are resistant to chemical degradation from modern fuel additives. The heavy-duty housing is built to withstand the intense vibrations and high-heat conditions typical of inboard marine environments.
• Installation Limit: Professional marine technician installation is highly recommended to ensure proper line priming and pressure verification. Strict Exclusion: Not compatible with carbureted engines or low-pressure-only systems. Ensure the fuel tank is free of debris and water contamination before installing the new 21608511 assembly to prevent immediate pump failure.