860234-A1 Aftermarket Mercruiser Heat Exchanger | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercruiser Heat Exchanger - Replacement Part Number: 860234-A1

Front-mounted heat exchanger for MerCruiser V6 and small-block V8 closed-cooling systems.

⚙️ 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:

• 860234A1 → Supersedes 860234P and 860234

OEM / Related Numbers:

• 860234A1

• 860234-A1

• 860234P

• 860234

Aftermarket / Verified Equivalents:

• Seakamp: 860234A1 replacement

• Mr Cool: MRC860234A1

• Lenco: 860234A1 replacement

🚤 Compatibility

Commonly used on:

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

Typically suits:

• Engine models:

• MerCruiser 4.3L V6

• MerCruiser 5.0L and 5.7L V8

• MerCruiser 6.2L V8

• Body Diameter: approximately 4 in

• Overall Length: approximately 17-1/2 in

• Mounting Position: front mount over circulation pump

• Year Range: approximately 1997-2001

🔌 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