19279-ZW9-010 Honda Marine Spring | Genuine OEM Outboard Part

🔧 Product Description

Genuine Honda Marine Flush-Valve Spring - Part Number: 19279-ZW9-010

A genuine Honda flush-valve spring used in both compact ZW9 thermostat assemblies and later large-engine mount-case systems. It supersedes the earlier 19279-ZW9-000 spring.

⚙️ Key Features

• Current Honda ZW9 flush-valve spring
• Factory-calibrated preload
• Corrosion-resistant small coil design
• Used with valve 19291-ZW9-000
• Shared across several Honda cooling-system families

🚤 Compatibility

Commonly used on

• Honda Marine four-stroke outboard cooling-system applications

Typically suits

• Engine models:
• BF8D, BFP8D, BF9.9D, BFP9.9D, BF10B/D, BFP10B/D, BF15D and BF20D
• BF75D, BF80A, BF90D and BF100A where the ZW9 spring is catalogued
• BF115D/J, BF135A/D and BF150A/D
• Selected BF200D, BF225D and BF250D mount-case applications
• HP Range: 8HP-250HP, model and assembly dependent
• Engine Type: Honda four-stroke outboard flush-valve system
• Year Range: Approximately 2001 onward

🔌 Function

Provides the closing force for the flush valve so it seals during normal operation and opens only when the designed pressure or flushing flow is present.

⚠️ Common Signs of Failure

• Flush valve sticks open or closed
• Spring corrosion or loss of free length
• Irregular cooling-water discharge
• Leakage from the valve chamber
• Engine temperature changes after salt build-up

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 19279-ZW9-010 → Supersedes 19279-ZW9-000

OEM / Related Numbers

• Honda: 19279-ZW9-010
• Honda: 19279-ZW9-000
• Related valve: 19291-ZW9-000

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine Honda Marine OEM part
• Brand new
• Supplied in original or equivalent packaging