91353-MB0-003 Honda Marine O-Ring | Genuine OEM Outboard Part

🔧 Product Description

Genuine Honda Marine Water-Pump O-Ring - Part Number: 91353-MB0-003

Genuine Honda 58.5 × 3.5mm O-ring used in selected outboard water-pump and vertical-shaft assemblies. It seals adjoining pump or shaft-housing components to prevent cooling-water leakage and loss of pump efficiency.

⚙️ Key Features

• Genuine Honda sealing O-ring
• Nominal dimensions: 58.5mm × 3.5mm
• Used in water-pump and vertical-shaft assemblies
• Suitable for continuous marine cooling-water exposure
• Replace when dismantling the associated pump housing

🚤 Compatibility

Commonly used on

• Honda outboard water-pump assemblies
• Vertical-shaft and extension-case cooling-water passages

Typically suits

• Engine models:
• BF75A and BF75D families
• BF90A and BF90D families
• BF100A family
• BF115A family
• BF130A family
• BFP60A family
• HP Range: 60HP-130HP
• Engine Type: Four-stroke outboards
• Year Range: Approximately 1995 onward across the applicable engine generations
• Serial Note: Water-pump arrangements differ by shaft length and production revision; verify by complete model and frame serial.

🔌 Function

The O-ring seals the water-pump or vertical-shaft housing joint so cooling water is directed through the engine rather than escaping internally.

⚠️ Common Signs of Failure

• Reduced cooling-water flow
• Water leakage around the pump housing
• Engine overheating at low speed
• Salt deposits around the sealing joint
• Flattened, swollen or split O-ring

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 91353-MB0-003 (current documented Honda reference)

OEM / Related Numbers

• 91353MB0003
• Seal size reference: 58.5 × 3.5mm

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

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