23525273 Aftermarket MTU Detroit Diesel Oil Cooler | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Transmission Gear-Oil Cooler - Replaces Part Number: 23525273

New copper-nickel gear-oil cooler replacing Detroit Diesel 23525273. The approximately 5-inch × 17-inch assembly is used on Series 60 marine propulsion installations.

⚙️ Key Features

• Direct replacement for Detroit Diesel 23525273

• Approximately 5-inch diameter × 17-inch overall length

• Approximately 8-inch tube-bundle section

• Approximately 2.5-inch seawater and 1-inch NPT oil connections

• Copper-nickel core for marine service

🧰 Kit / Assembly Contents

• 1 × Complete transmission/gear-oil cooler - P/N 23525273

• 1 × Integrated copper-nickel tube bundle

• Oil-line fittings, seawater hoses, zincs and mounting hardware are renewed separately

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 23525273 → Cross-references earlier Detroit Diesel 5102389 and 5120895 where specified

OEM / Related Numbers:

• 5102389

• 5120895

• 23525273CN

Aftermarket / Verified Equivalents:

• Lenco: LE23525273

• Seakamp copper-nickel replacement for OEM 23525273

• Mr Cool: MRC23525273CN

🚤 Compatibility

Commonly used on:

• Detroit Diesel Series 60 marine propulsion engines

Typically suits:

• Engine / Equipment models:

• Series 60 marine engines whose gearbox cooling arrangement specifies 23525273

• Output / Engine Rating: Engine rating is marine calibration-dependent

• Engine / System Type: Inline six-cylinder four-stroke turbocharged diesel with marine transmission

• Year Range: Series 60 marine production era

• Serial / Model Identification: Confirm transmission model, oil-port threads and seawater-hose dimensions.

🔌 Function

The cooler transfers heat from transmission or reduction-gear oil into the raw-water circuit. Correct oil temperature protects clutches, bearings, seals and hydraulic control components.

Common signs of failure:

• High transmission or reduction-gear oil temperature

• Burnt, darkened or aerated gear oil

• Delayed engagement, slipping or abnormal gear noise when hot

• Water-contaminated or milky transmission oil

• External oil leakage, corrosion or failed pressure test

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging