16918-ZY3-003 Honda Marine O-Ring | Genuine OEM Outboard Part

🔧 Product Description

Genuine Honda Fuel Strainer O-Ring - Part Number: 16918-ZY3-003

A genuine Honda sealing O-ring used with the fuel strainer/water-separator assembly on large Honda EFI outboards. It seals the strainer bowl or adjoining fuel component to prevent fuel leakage and air entry.

⚙️ Key Features

• Genuine Honda fuel-compatible elastomer
• Correct ZY3 cross-section and diameter
• Prevents both external fuel leakage and suction-side air leaks
• Should be replaced whenever the strainer joint is opened

🚤 Compatibility

Commonly used on

• Honda BF175A/BF200A/BF225A/BF250A
• Honda BF200D/BF225D/BF250D
• Selected later Honda EFI outboards whose fuel-strainer diagram specifies 16918-ZY3-003

Typically suits

• HP Range: 175-250 HP across verified applications
• Engine Type: V6 EFI four-stroke outboard
• Year Range: Approximately 2002 onward
• Serial / Identification Range: Confirm the full engine model and fuel-strainer assembly because other O-ring sizes are used in adjacent fuel-system joints.

🔌 Function

Seals the fuel-strainer joint so the pump receives an uninterrupted, leak-free fuel supply.

⚠️ Common Signs of Failure

• Fuel odour or visible seepage
• Air bubbles in the fuel supply
• Hard starting after the engine sits
• O-ring swelling, flattening, cracking or cuts

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 16918-ZY3-003 - current verified service reference; no later direct supersession confirmed

OEM / Related Numbers

• 16918-ZY3-003
• 16918ZY3003

Aftermarket / Verified Equivalents

• No verified direct aftermarket equivalent

📦 Condition

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