344595 Aftermarket Kohler Heat Exchanger 4/5EFZ, 4/6.5ESZ | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Generator Heat Exchanger - Replaces Part Number: 344595

New copper-nickel replacement heat exchanger for Kohler 344595. It is used on specified 4/5EFZ and 4/6.5ESZ compact marine generator configurations.

⚙️ Key Features

• Direct replacement for Kohler 344595

• Copper-nickel seawater bundle

• Compact Kohler generator-set configuration

• Original-style hose and mounting layout

• Serviceable end-cap and zinc protection

🧰 Kit / Assembly Contents

• 1 × Complete heat exchanger assembly - P/N 344595

• 1 × integrated copper-nickel tube bundle

• End-cap seals, zinc and mounting hardware are renewed separately unless included

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 344595 (Kohler OEM heat-exchanger reference)

OEM / Related Numbers:

• 344595-S

• 344595CN

Aftermarket / Verified Equivalents:

• Seakamp: 344595CN

• Mr Cool: MRC344595CN

• Lenco: LE344595

🚤 Compatibility

Commonly used on:

• Kohler compact closed-cooled marine generator sets

Typically suits:

• Engine / Equipment models:

• 4EFZ and 5EFZ specification variants using 344595

• 4ESZ and 6.5ESZ specification variants using 344595

• Output / Engine Rating: Approximately 4kW - 6.5kW generator output

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

• Year Range: Model/specification-dependent

• Serial / Model Identification: Confirm the generator specification because 246491 is used on other versions of the same model families.

🔌 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