94109-12000 Honda Marine Washer | Genuine OEM Outboard Part

🔧 Product Description

Genuine Honda Marine 12mm Drain-Plug Sealing Washer - Part Number: 94109-12000

Genuine Honda 12mm sealing washer used beneath selected engine-oil and gear-oil drain plugs. The soft crush-style washer deforms as the plug is tightened to form a reliable oil seal against the machined housing surface.

⚙️ Key Features

• Genuine Honda 12mm sealing washer
• Designed for drain-plug service
• Single-use crush-style sealing component
• Helps prevent oil seepage and thread contamination
• Replace whenever the associated drain plug is removed

🚤 Compatibility

Commonly used on

• Honda outboard oil-drain and gearcase-drain applications where a 12mm sealing washer is specified

Typically suits confirmed marine applications including

• Engine models:
• BF4.5 family
• BF5 and BF5D families
• BF6A family
• BF115A family
• BF130A family
• HP Range: 4.5HP-130HP across confirmed applications
• Engine Type: Four-stroke outboards
• Year Range: Application-dependent across multiple Honda production generations
• Installation Note: Use only where the parts diagram specifies 94109-12000; drain-plug diameter and washer type differ between engines.

🔌 Function

The washer compresses between the drain-plug flange and housing to prevent oil escaping along the plug threads or sealing face.

⚠️ Common Signs of Failure

• Oil film around the drain plug
• Slow drip after servicing
• Washer is flattened, grooved or split
• Plug must be overtightened to stop leakage
• Damaged housing face caused by repeated washer reuse

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 94109-12000 (current documented Honda reference)

OEM / Related Numbers

• 9410912000
• Nominal fastener size: 12mm

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

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