119575-44010 Aftermarket Yanmar 6LYA/6LY2A Heat Exchanger | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Engine Heat Exchanger - Replaces Part Number: 119575-44010

New heavy-duty copper-nickel heat exchanger replacing the earlier Yanmar 119574-44010 and 119574-44011 assemblies. The approximately 5-inch × 23-inch unit is used on 6LYA and 6LY2A six-cylinder marine diesels.

⚙️ Key Features

• Current replacement service family for 119574-44010 and 119574-44011

• Approximately 5-inch diameter × 23-inch shell

• Copper-nickel seawater bundle

• Designed for high-output 6LYA and 6LY2A engines

• Serviceable end covers and sacrificial-zinc protection

🧰 Kit / Assembly Contents

• 1 × Complete heat exchanger assembly - P/N 119575-44010

• 1 × Integrated copper-nickel tube bundle - supplied within the assembly

• End caps, O-rings, zincs and installation hardware are supplied or ordered according to manufacturer package

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 119575-44010 → Supersedes 119574-44011

• 119574-44011 → Supersedes/updates 119574-44010

OEM / Related Numbers:

• 119574-44010

• 119574-44011

• 11957544010

Aftermarket / Verified Equivalents:

• Mr Cool: MRC119575-44010CN

• Lenco: LE119575-44010

• Seakamp copper-nickel replacement for the 6LY heat-exchanger family

🚤 Compatibility

Commonly used on:

• Yanmar 6LY-series closed-cooled marine diesel engines

Typically suits:

• Engine / Equipment models:

• 6LYA-STE, 6LYA-STP and 6LYA-UTE

• 6LY2A-STE and 6LY2A-STP

• Selected 6LY3 installations only where the original parts list specifies this exchanger family

• Output / Engine Rating: Approximately 315HP - 440HP

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

• Year Range: 6LYA and 6LY2A production era; serial-dependent

• Serial / Model Identification: Confirm engine model, serial number and original exchanger number before ordering.

🔌 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