864395T Aftermarket Mercruiser 4.3L/5.0L/5.7L/6.2L Heat Exchanger Without Hose | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercruiser 4.3L/5.0L/5.7L/6.2L Heat Exchanger Without Hose - Replacement Part Number: 864395T

Front-mounted heat exchanger for the internally drained surge-tank configuration.

⚙️ Key Features

• Marine-grade shell-and-tube heat exchanger

• Designed as a direct replacement for the listed reference numbers

• Helps maintain stable operating temperature under sustained marine load

• Marine connection sizes and mounting points must match the original assembly

• Suitable for professional marine cooling-system service and replacement

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 864395T (hose-excluded package)

OEM / Related Numbers:

• 864395T

• 864395T01 hose-included counterpart

Aftermarket / Verified Equivalents:

• Mr Cool: MRC864395T

• Seakamp: 864395T replacement

🚤 Compatibility

Commonly used on:

• Marine-grade shell-and-tube heat exchanger systems

Typically suits:

• Engine models:

• MerCruiser 4.3L V6

• MerCruiser 5.0L, 5.7L and 6.2L V8

• Mounting Position: front mount over circulation pump

• Package Content: heat exchanger without external drain/return hose

🔌 Function

The heat exchanger keeps closed-loop coolant separate from seawater while transferring heat through the tube stack.

Common signs of failure:

• Engine or generator temperature rises above normal under load

• Coolant loss or seawater leakage around the exchanger

• Restricted seawater flow from scale, debris or damaged tubes

• Coolant contamination caused by an internal tube failure

• Corroded end covers, tube stack or sacrificial anode

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging