86247T Aftermarket Mercruiser V8 Fuel Pump 454, 330, 325, 350, 390 Engines | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Mechanical V8 Fuel Pump - Replaces Part Number: 86247T

New aftermarket mechanical/pulse-operated fuel pump replacing 86247T. It is configured for GM 454 CID 330HP, 325HP, 350HP and 390HP marine engines, Specified 7.4L/8.2L carburetted big-block packages. The exact engine model, serial range, fuel pressure and connection layout must match the original installation.

⚙️ Key Features

• Direct replacement for the 86247T service family

• Designed for MerCruiser GM big-block V8 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: 86247T

• 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:

• 8M0058164 → Later replacement associated with 86247T

OEM / Related Numbers:

• 8M0058164

Aftermarket / Verified Equivalents:

• MerCruiser: 8M0058164

• Recmar: REC86247T

• Marine mechanical big-block-pump equivalents matched by arm and ports

🚤 Compatibility

Commonly used on:

• MerCruiser GM big-block V8 engines

Typically suits:

• Engine models:

• GM 454 CID 330HP, 325HP, 350HP and 390HP marine engines

• Specified 7.4L/8.2L carburetted big-block packages

• HP / Output Range: Approximately 325HP - 390HP

• Engine / System Type: MerCruiser GM big-block V8 engines

• Year Range: Model- and serial-dependent

• Serial / Pump Identification: Match P/N 86247T 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