78094 Aftermarket Mercruiser Rear-Mount Heat Exchanger | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercruiser Rear-Mount Heat Exchanger - Replacement Part Number: 78094

Rear-mounted heat exchanger for MerCruiser GM small-block V8 inboard engines.

⚙️ 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:

• 78094 → Replaces 78094A3 and 78091A1

OEM / Related Numbers:

• 78094

• 78094A3

• 78091A1

Aftermarket / Verified Equivalents:

• Seakamp: 78094 replacement

• Lenco: LE-78094

• Mr Cool: MRC78094

🚤 Compatibility

Commonly used on:

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

Typically suits:

• Engine models:

• MerCruiser 230 / 5.0L MIE

• MerCruiser 260 / 5.7L MIE

• Engine Displacement: 305 CID / 5.0L and 350 CID / 5.7L

• Mounting Position: rear mount over transmission

• Overall Length: approximately 18-1/2 in

🔌 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