130-4067 Aftermarket Onan MDKUB Heat Exchanger | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Generator Heat Exchanger - Replaces Part Number: 130-4067

New copper-nickel replacement for Onan 130-4067. The compact approximately 2-inch diameter × 12.25-inch heat exchanger is used on MDKUB marine generator sets.

⚙️ Key Features

• Direct replacement for Onan 130-4067

• Approximately 2-inch diameter × 12.25-inch overall length

• Copper-nickel seawater bundle

• Original-style hose and mounting orientation

• Designed for Onan MDKUB generator cooling systems

🧰 Kit / Assembly Contents

• 1 × Complete heat exchanger assembly - P/N 130-4067

• 1 × Integrated copper-nickel tube bundle

• End caps, seals, zinc and mounting hardware are renewed separately unless supplied

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 130-4067 (Onan OEM heat-exchanger reference)

OEM / Related Numbers:

• 1304067

• 130-4067CN

Aftermarket / Verified Equivalents:

• Mr Cool: MRC130-4067CN

• Seakamp: 130-4067CN

• Lenco: LE130-4067

🚤 Compatibility

Commonly used on:

• Onan MDKUB closed-cooled marine generator sets

Typically suits:

• Engine / Equipment models:

• MDKUB specification variants whose parts list identifies 130-4067

• Output / Engine Rating: Generator rating is specification-dependent

• Engine / System Type: Closed-cooled marine diesel generator engine

• Year Range: MDKUB production era

• Serial / Model Identification: Confirm model, specification letter and exact hose/port arrangement.

🔌 Function

The heat exchanger transfers engine or generator coolant heat into the raw-water circuit while keeping the two fluids separated. This maintains the correct closed-circuit operating temperature and protects the engine from direct seawater circulation.

Common signs of failure:

• Engine or generator overheating under sustained load

• Coolant loss without an obvious external hose leak

• Saltwater and coolant cross-contamination

• Restricted raw-water discharge or uneven end-cap temperature

• Corrosion, green staining, cracked solder joints or pressure-test failure

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging