8M0125855 Aftermarket Mercruiser Power Steering Cooler | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercruiser Power Steering Cooler - Replacement Part Number: 8M0125855

Current-service power-steering cooler replacing the earlier 807292T family.

⚙️ 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:

• 8M0125855 → Supersedes 807292T

OEM / Related Numbers:

• 8M0125855

• 8M0125856

• 807292T

• 863820T

• 861554T01

• 861554T02

Aftermarket / Verified Equivalents:

• Mr Cool: MRC863820T01

• Seakamp: 8M0125855 replacement

🚤 Compatibility

Commonly used on:

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

Typically suits:

• Engine models:

• MerCruiser 3.0L

• MerCruiser 4.3L V6

• MerCruiser 5.0L and 5.7L V8

• Related MPI/MAG/MX configurations

• Fluid Type: power-steering oil

• Installation Note: match water-hose and oil-barb sizes

🔌 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