4428 Aftermarket Bombardier Fuel Pump | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Fuel Pump Assembly - Replaces Part Number: 4428

New aftermarket mechanical/pulse-operated fuel pump replacing 4428. It is configured for Johnson/Evinrude outboards using BRP 5004428/4428 service family. The exact engine model, serial range, fuel pressure and connection layout must match the original installation.

⚙️ Key Features

• Direct replacement for the 4428 service family

• Designed for Johnson / Evinrude / BRP fuel-system applications

• Pulse- or engine-driven low-pressure fuel delivery

• Marine fuel-resistant diaphragm and valve materials

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

🧰 Kit / Assembly Contents

• 1 × Complete mechanical/pulse fuel-pump assembly - Part Number: 4428

• 1 × Integrated diaphragm and check-valve assembly

• 1 × Pump-to-engine mounting gasket - supplied where included by the selected manufacturer

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 4428 ↔ Short-form catalogue reference to 5004428

OEM / Related Numbers:

• 5004428

Aftermarket / Verified Equivalents:

• BRP: 5004428

• Recmar: REC4428

🚤 Compatibility

Commonly used on:

• Johnson / Evinrude / BRP fuel-system applications

Typically suits:

• Engine models:

• Johnson/Evinrude outboards using BRP 5004428/4428 service family

• HP / Output Range: 75HP - 175HP

• Engine / System Type: Johnson / Evinrude / BRP fuel-system applications

• Year Range: Model- and serial-dependent

• Serial / Pump Identification: Match P/N 4428 to the model-specific parts diagram and verify pressure, electrical connector, inlet/outlet orientation and mounting before ordering.

🔌 Function

The engine-driven diaphragm pump uses crankcase pulses or a cam-operated lever to draw fuel from the tank and deliver a regulated low-pressure supply to the carburettor, vapour separator or downstream high-pressure pump.

Common signs of failure:

• Hard starting after the engine has been standing

• Fuel starvation, hesitation or loss of power under load

• Failure to fill the carburettor bowls or vapour separator

• Fuel leaking from the pump body or ruptured diaphragm

• Engine-oil dilution or fuel entering the pulse passage on a failed pump

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging