119175-44080 Aftermarket Yanmar 4LHA-STZE(P)/DTZE(P) Heat Exchanger | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Engine Heat Exchanger - Replaces Part Number: 119175-44080

New copper-nickel replacement heat exchanger for the Yanmar 4LHA closed-cooling system. The approximately 4-inch × 19-inch assembly replaces OEM 119175-44080 on the listed straight-drive and sterndrive engine variants.

⚙️ Key Features

• Direct replacement for Yanmar 119175-44080

• Approximately 4-inch diameter × 19-inch shell

• Copper-nickel seawater tube bundle

• Supports straight-drive and Z-drive 4LHA variants

• Uses replaceable sacrificial-zinc protection

🧰 Kit / Assembly Contents

• 1 × Complete heat exchanger assembly - P/N 119175-44080

• 2 × Sacrificial anodes - Yanmar P/N 119574-44150, fitted where specified

• 1 × Related cover service kit - Yanmar P/N 119175-33320, ordered separately unless included

• End-cap seals and mounting hardware are renewed separately unless supplied

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 119175-44080 (Yanmar OEM heat-exchanger reference)

OEM / Related Numbers:

• 11917544080

• 119574-44150

• 119175-33320

Aftermarket / Verified Equivalents:

• Mr Cool: MRC119175-44080CN

• Lenco: LE119175-44080

• Seakamp copper-nickel replacement for OEM 119175-44080

🚤 Compatibility

Commonly used on:

• Yanmar 4LHA closed-cooled marine diesel engines

Typically suits:

• Engine / Equipment models:

• 4LHA-DTE, 4LHA-DTP and 4LHA-DTZE/DTZE(P)

• 4LHA-HTE, 4LHA-HTP and 4LHA-HTZE/HTZE(P)

• 4LHA-STE, 4LHA-STP and 4LHA-STZE/STZE(P)

• Output / Engine Rating: Approximately 160HP - 240HP

• Engine / System Type: Four-cylinder turbocharged/intercooled marine diesel engine

• Year Range: 4LHA model production; serial-dependent

• Serial / Model Identification: Confirm the full engine suffix and compare the seawater and coolant connection 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