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

🔄 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

🚤 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.

Common signs of wear:

• 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

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

📦 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