19361-ZW9-405 Honda Marine Water Jacket | Genuine OEM Outboard Part

🔧 Product Description

Genuine Honda Marine Water-Jacket Cover - Part Number: 19361-ZW9-405

A genuine dark-grey Honda water-jacket cover used on the compact BF8-BF20 four-stroke thermostat assembly. It closes the external cooling-water chamber and protects the thermostat and flush-valve passages.

⚙️ Key Features

• Factory Honda water-jacket geometry

• Dark-grey NH8 finish

• Used on compact twin-cylinder outboards

• Direct fit with the ZW9 thermostat assembly

• Marine corrosion-resistant construction

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• No supersession; current Honda OEM reference

OEM / Related Numbers:

• Honda: 19361-ZW9-405

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Honda Marine four-stroke outboard cooling-system applications

Typically suits:

• Engine models:

• BF8B/D and BFP8B/D

• BF9.9D and BFP9.9D

• BF10B/D and BFP10B/D

• BF15D

• BF20D

• HP Range: 8HP-20HP

• Engine Type: Inline two-cylinder four-stroke outboard

• Year Range: Approximately 2001 onward

🔌 Function

Closes the cooling-water jacket and directs water around the thermostat and flushing passages before it returns to the engine circuit.

Common signs of failure:

• External water leak or salt staining

• Corrosion or pitting on the gasket face

• Cracked cover or hose connection

• Restricted passages from scale build-up

• Thermostat or flush valve no longer sits correctly

📦 Condition

• Genuine Honda Marine OEM part

• Brand new

• Supplied in original or equivalent packaging