MRC9309-90MB Aftermarket Yanmar ZF85A Oil Cooler 1-3/4 in Hose | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Yanmar ZF85A Oil Cooler 1-3/4 in Hose - Replacement Part Number: MRC9309-90MB

High-pressure ZF85A gear-oil cooler with 1-3/4-inch seawater connections.

⚙️ Key Features

• Marine-grade shell-and-tube oil cooler

• Designed as a direct replacement for the listed reference numbers

• Helps maintain stable operating temperature under sustained marine load

• Marine connection sizes and mounting points must match the original assembly

• Suitable for professional marine cooling-system service and replacement

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• MRC9309-90MB / 9309-90MB (1-3/4-inch water version)

OEM / Related Numbers:

• 9309-90MB

• MRC9309-90MB

• M5354-3091CN 1-1/2-inch sister version

Aftermarket / Verified Equivalents:

• Mr Cool: MRCRD9309-90MB

🚤 Compatibility

Commonly used on:

• Marine-grade shell-and-tube oil cooler systems

Typically suits:

• Engine models:

• Yanmar marine engines coupled to ZF85A transmissions using 1-3/4-inch seawater hose

• Body Diameter: 3 in

• Bundle Length: 10 in

• Overall Length: 14 in

• Water Connections: 1-3/4 in

• Oil Connections: 3/8 in NPT

• Typical Engine Rating: approximately 440HP

🔌 Function

The cooler transfers heat from oil into the raw-water circuit without allowing the fluids to mix.

Common signs of failure:

• Oil or steering-fluid temperature rises above normal

• Loss of pressure or reduced transmission/steering performance as oil heats

• Oil sheen at the exhaust outlet or cross-contamination

• External leakage from fittings, seams or tube ends

• Restricted seawater flow, corrosion or internal tube failure

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging