861156A03-KIT Aftermarket Mercruiser High-Pressure Fuel Pump Cooler Kit | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement High-Pressure Fuel Pump and Cooler Service Kit - Replaces Part Number: 861156A03-KIT

New aftermarket fuel-pump service kit replacing 861156A03-KIT. It is configured for 4.3L V6 Alpha and Bravo EFI/MPI engines using the short early cooler without a water-drain port. The exact engine model, serial range, fuel pressure and connection layout must match the original installation.

⚙️ Key Features

• Direct replacement for the 861156A03-KIT service family

• Designed for MerCruiser early Cool Fuel V6 systems

• Includes pump and sealing components required by the service family

• Designed for leak-free marine fuel-module servicing

• Confirm the engine serial, pump pressure and port orientation before installation

🧰 Kit / Assembly Contents

• 1 × High-pressure electric fuel pump - supplied under the listed kit/assembly

• 1 × Water-cooled fuel-cooler body - supplied in the complete assembly

• 1 × Pump seal/O-ring set - supplied under the kit

• 1 × Fuel-line and mounting hardware set - contents vary by service-kit manufacturer

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 8M0125852 → Later service-kit reference associated with 861156A03

OEM / Related Numbers:

• 861156A03

• 8M0125852

Aftermarket / Verified Equivalents:

• MerCruiser: 8M0125852 service-kit family

• Aftermarket high-pressure pump/cooler kit

🚤 Compatibility

Commonly used on:

• MerCruiser early Cool Fuel V6 systems

Typically suits:

• Engine models:

• 4.3L V6 Alpha and Bravo EFI/MPI engines using the short early cooler without a water-drain port

• HP / Output Range: Approximately 190HP - 225HP

• Engine / System Type: MerCruiser early Cool Fuel V6 systems

• Year Range: Model- and serial-dependent

• Serial / Pump Identification: Match P/N 861156A03-KIT to the model-specific parts diagram and verify pressure, electrical connector, inlet/outlet orientation and mounting before ordering.

🔌 Function

The service kit renews the pump, seals and supporting components required to restore fuel pressure and leak-free operation in the specified fuel module.

Common signs of failure:

• Low or unstable fuel pressure

• Fuel leakage from the module or pump seals

• Hard starting or engine stalling

• Pump noise or intermittent electrical operation

• Fuel starvation under acceleration or sustained load

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging