4944404 / 3897517 Aftermarket Cummins QSB/QSC/QSM Fuel Cooler | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Cummins QSB/QSC/QSM Fuel Cooler - Replacement Part Number: 4944404 / 3897517

Copper-nickel fuel cooler for Cummins QSB, QSC and QSM marine diesel fuel-return circuits.

⚙️ Key Features

• Marine-grade shell-and-tube fuel cooler

• 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:

• 5288253 → Supersedes 4944404

• 4944404 → Supersedes 3897517

OEM / Related Numbers:

• 5288253

• 4944404

• 3897517

Aftermarket / Verified Equivalents:

• Mr Cool: MRC3897517 / MRC4944404

• Seakamp: 5288253 copper-nickel replacement

🚤 Compatibility

Commonly used on:

• Marine-grade shell-and-tube fuel cooler systems

Typically suits:

• Engine models:

• Cummins QSB marine engines

• Cummins QSC marine engines

• Cummins QSM and QSM11 marine engines

• Overall Length: approximately 14 in

• Bundle Length: approximately 10-3/4 in

• Body Diameter: approximately 2-1/8 in

• Seawater Connection: approximately 1-7/8 in

🔌 Function

The fuel cooler removes heat from the fuel circuit through a seawater-cooled tube stack.

Common signs of failure:

• Fuel temperature rises and performance falls under load

• Hard hot starting or unstable fuel pressure

• Fuel or seawater leaks around the cooler

• Fuel sheen appears at the exhaust outlet

• Corrosion, restriction or loss of seawater flow

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging