036899 Aftermarket Westerbeke Heavy-Duty Heat Exchanger | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Heavy-Duty Heat Exchanger - Replaces Part Number: 036899

New heavy-duty copper-nickel replacement for Westerbeke 036899. It replaces the standard copper exchanger on the listed Westerbeke propulsion engines and generator-derived engine packages, providing improved resistance to saltwater erosion and dezincification.

⚙️ Key Features

• Direct replacement for Westerbeke 036899

• Copper-nickel seawater tube bundle

• Heavy-duty alternative to the standard copper exchanger

• Retains the original hose, mounting and end-cap layout

• Pressure-test the complete cooling circuit after installation

🧰 Kit / Assembly Contents

• 1 × Complete heavy-duty heat exchanger assembly - replacement P/N 036899

• 1 × Integrated copper-nickel tube bundle - supplied within P/N 036899

• End caps, gaskets, zinc and mounting hardware are transferred or renewed separately unless supplied with the selected manufacturer's package

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 036899 → Replaces earlier exchanger used on the 18/21A/27A/33A cooling system

• 044189 (related Westerbeke Cunkl/heavy-duty exchanger reference on selected B-series engines)

OEM / Related Numbers:

• WB-036899

• MRC36899CN

• 036899CN

Aftermarket / Verified Equivalents:

• Mr Cool: MRC36899CN

• Lenco: LE036899

• Copper-nickel heavy-duty replacement manufactured to Westerbeke 036899 dimensions

🚤 Compatibility

Commonly used on:

• Westerbeke closed-cooled marine diesel engines

Typically suits:

• Engine / Equipment models:

• Westerbeke 18, 21A, 27A and 33A

• Westerbeke 35B Three, 35B3, 35C, 35D and 35E

• Westerbeke 38B Four and 42B Four

• Westerbeke 44A, 44B and 44C

• Output / Engine Rating: Approximately 18HP - 44HP

• Engine / System Type: Three- or four-cylinder naturally aspirated marine diesel engine

• Year Range: Model-dependent Westerbeke production from the 1980s through 2000s

• Serial / Model Identification: Confirm OEM P/N 036899 and compare hose connections, mounting brackets and end-cap orientation.

🔌 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