129670-33000 Aftermarket Yanmar 4JH3E Oil Cooler | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Engine Oil Cooler - Replaces Part Number: 129670-33000

New copper-nickel engine-oil cooler replacing Yanmar 129670-33000 for the 4JH3 marine-diesel family. The compact unit is approximately 2 inches in diameter and 8-8.5 inches overall, with approximately 1-inch seawater connections.

⚙️ Key Features

• Direct replacement for Yanmar 129670-33000

• Approximately 2-inch diameter × 8-8.5-inch overall length

• Approximately 1-inch seawater hose connections

• Copper-nickel tube stack

• Compact direct-fit 4JH3 engine-oil cooler

🧰 Kit / Assembly Contents

• 1 × Complete engine-oil cooler assembly - P/N 129670-33000

• 1 × Integrated copper-nickel tube stack

• Oil seals, seawater hoses and retaining hardware are renewed separately

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 129670-33000 (Yanmar OEM oil-cooler reference)

OEM / Related Numbers:

• 12967033000

Aftermarket / Verified Equivalents:

• Mr Cool: MRC129670-33000CN

• Lenco: LE129670-33000

• Seakamp copper-nickel replacement for OEM 129670-33000

🚤 Compatibility

Commonly used on:

• Yanmar 4JH3-series marine diesel engines

Typically suits:

• Engine / Equipment models:

• 4JH3E

• 4JH3-TE and related turbocharged 4JH3 applications where 129670-33000 is specified

• Output / Engine Rating: Approximately 56HP - 75HP

• Engine / System Type: Inline four-cylinder marine diesel engine

• Year Range: 4JH3 production era

• Serial / Model Identification: Confirm the engine suffix and original cooler dimensions before ordering.

🔌 Function

The cooler transfers heat from lubricating oil into the raw-water circuit. Controlling oil temperature preserves viscosity, bearing protection and stable oil pressure during sustained load.

Common signs of failure:

• Lubricating-oil temperature rising above normal

• Low oil pressure after the engine reaches operating temperature

• Oil film in the raw-water discharge or coolant circuit

• Water-contaminated or milky lubricating oil

• External leakage, corrosion or failed pressure test

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging