0777129 Evinrude Johnson Impeller 389589 | Genuine OEM BRP Outboard Part

🔧 Product Description

Genuine BRP Evinrude Johnson Pin-Key Water Pump Impeller - Part Numbers: 0777129 and 0389589

A genuine BRP flexible water-pump impeller for selected 40HP, 50HP, 55HP and 60HP Evinrude and Johnson two-stroke outboards.

This impeller uses a pin-style drive key. It must not be confused with later wedge-key impeller 0777214, even though both are used in similar horsepower ranges.

⚙️ Key Features

• Genuine BRP OEM water-pump impeller
• Current service number 0777129
• Earlier OEM number 0389589
• Common reference 389589
• Pin-style impeller-key design
• Suitable for selected late-1970s and mid-1980s gearcases
• Broad aftermarket support

🚤 Compatibility

Typically suits selected

• 40HP
• 50HP
• 55HP
• 60HP two-stroke outboards
• Twin-cylinder gearcases using the pin-style impeller drive

Representative application period

• Approximately 1979-1985
• Verified 1980-1982 50HP-60HP gearcase applications
• Additional engines whose water-pump diagram lists 0389589 or 0777129

Important fitment note

• Confirm that the original impeller uses a pin key.
• Wedge-key impeller 0777214 is a different component.
• Later 40HP-50HP engines may use 0432941 or 0765350.
• The key, O-rings and water-pump housing are separate unless shown.

🔌 Function

The impeller draws cooling water through the gearcase intake and supplies it to the engine.

Installation considerations

• Confirm the pin-key arrangement
• Inspect the driveshaft and key bore
• Replace a worn drive pin
• Inspect the cup, plate and housing
• Remove all broken vane fragments
• Lubricate the impeller before assembly
• Rotate the driveshaft while lowering the housing
• Confirm cooling-water flow immediately after installation

⚠️ Common Signs of Failure

• Weak tell-tale flow
• Overheating at idle
• Cracked or missing vanes
• Hub separates from the rubber
• Drive pin is worn or sheared
• Impeller does not turn with the driveshaft
• Pump cup is scored
• Rubber fragments block the cooling system

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 0389589
• 389589
• 0777129
• 777129
• 0777827
• 777827

Aftermarket / Verified Equivalents

• Sierra: 18-3055
• GLM: 89690
• Mallory: 9-45202
• SEI Marine: 96-365-03CE
• CEF: 500345
• Recmar: REC777129
• EMP: 47-01920
• Generic 389589 pin-key impellers

📦 Condition

• Genuine BRP Evinrude Johnson OEM part
• Brand new
• Impeller key included only when specifically supplied in the package
• Supplied in genuine or equivalent protective packaging