86234A4 Aftermarket Mercruiser Fuel Pump | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Mechanical Fuel Pump - Replaces Part Number: 86234A4

New aftermarket mechanical/pulse-operated fuel pump replacing 86234A4. It is configured for MerCruiser 470, 485, 488 and 3.7L four-cylinder engines, 170HP 3.7L applications from serial 4208730 through 0B434940 where specified. The exact engine model, serial range, fuel pressure and connection layout must match the original installation.

⚙️ Key Features

• Direct replacement for the 86234A4 service family

• Designed for MerCruiser 224 CID / 3.7L four-cylinder petrol engines

• 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: 86234A4

• 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:

• 86234A4 → Later service reference associated with 49088T2

OEM / Related Numbers:

• 49088T2

Aftermarket / Verified Equivalents:

• Recmar: REC86234A4

• Aftermarket 3.7L MerCruiser mechanical fuel pump

🚤 Compatibility

Commonly used on:

• MerCruiser 224 CID / 3.7L four-cylinder petrol engines

Typically suits:

• Engine models:

• MerCruiser 470, 485, 488 and 3.7L four-cylinder engines

• 170HP 3.7L applications from serial 4208730 through 0B434940 where specified

• HP / Output Range: Approximately 165HP - 190HP

• Engine / System Type: MerCruiser 224 CID / 3.7L four-cylinder petrol engines

• Year Range: Approximately 1976 - 1989

• Serial / Pump Identification: Match P/N 86234A4 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