0439077 Evinrude Johnson Kit Water Pump Assembly | Genuine OEM BRP Outboard Part

🔧 Product Description

Genuine BRP Evinrude Johnson Water Pump Kit with Housing and Wedge Key - Part Number: 0439077

A genuine BRP complete water-pump repair kit for selected commercial and heavy-duty Evinrude and Johnson gearcases.

The kit includes the pump housing and is supplied with alternative wedge-style impeller keys so the installer can select the correct key for the driveshaft configuration.

⚙️ Key Features

• Genuine BRP OEM water-pump assembly kit
• Correct OEM part number 0439077
• Common unprefixed number 439077
• Complete kit with pump housing
• Wedge-style impeller-key configuration
• Typically supplied with two alternative keys
• Sierra replacement kits available

🚤 Compatibility

Commonly used on selected

• 40HP Commercial models
• 40HP RP and RW gearcase models
• Selected 40HP-60HP commercial or heavy-duty gearcases
• Verified 40 Commercial applications from approximately 1995-2001
• Gearcases whose diagram specifies 0396932, 0396933 or 0439077

Important fitment note

• This kit is not the same as every standard 40HP-60HP pump kit.
• Confirm the commercial-model suffix and gearcase diagram.
• Select the correct wedge key according to the supplied instructions.

🔌 Function

The pump draws cooling water through the lower-unit intakes and delivers it to the powerhead.

Installation considerations

• Identify the correct impeller key
• Inspect the driveshaft key area
• Remove old rubber fragments
• Replace the housing where worn
• Fit new gaskets and O-rings
• Seat the water tube correctly
• Rotate the driveshaft in the operating direction during assembly
• Verify cooling-water flow after installation

⚠️ Common Signs of Failure

• Weak tell-tale
• Engine overheats
• Impeller vanes are damaged
• Pump housing is distorted
• Wear plate is grooved
• Impeller key is worn
• Water-tube grommet leaks
• Pump fails to prime

🔄 Supersession & Cross Reference

OEM Supersession / Related Chain

• 0391635
• 391635
• 0390770
• 390770
• 0396932
• 396932
• 0396933
• 396933
• 0439077
• 439077
• 0777808
• 777808

Aftermarket / Verified Equivalents

• Sierra: 18-3399 - complete pump kit
• Sierra: 18-3385 - related pump-kit configuration
• Sierra: 18-3380 - related service kit without housing / pin-style application
• Aftermarket 439077 complete water-pump kits
• ROP Shop replacement kit for 0439077

Aftermarket kit note

• Sierra 18-3380 does not have the same contents as the complete housing kit.
• Confirm housing inclusion and key style before substitution.

📦 Condition

• Genuine BRP Evinrude Johnson OEM part
• Brand new complete service kit
• Contents may vary according to production packaging
• Supplied in genuine or equivalent protective packaging