91351-ZW1-B02 Honda Marine O-Ring | Genuine OEM Outboard Part

🔧 Product Description

Genuine Honda Marine Propeller-Shaft O-Ring - Part Number: 91351-ZW1-B02

Genuine Honda 94 × 4.1mm sealing O-ring used within the lower-unit propeller-shaft and bearing-carrier assembly on selected BF75, BF90, BF115 and BF130 outboards. It seals the gearcase around the propeller-shaft carrier to help retain gear lubricant and prevent water intrusion.

⚙️ Key Features

• Genuine Honda Marine replacement seal
• Nominal dimensions: 94mm inside diameter × 4.1mm section
• Designed for lower-unit gear-oil service
• Resistant to marine lubricant, heat and water exposure
• Replace whenever the bearing carrier is removed or seal condition is uncertain

🚤 Compatibility

Commonly used on

• Honda BF75 and BF90 gearcase assemblies
• Honda BF115 and BF130 propeller-shaft assemblies

Typically suits

• Engine models:
• BF75A and BF75D families
• BF90A and BF90D families
• BF115A family
• BF130A family
• HP Range: 75HP-130HP
• Engine Type: Four-stroke outboards
• Year Range: Principal applications from approximately 1997-2010, with selected later service applications
• Serial Note: Confirm against the complete model and frame serial because gearcase revisions differ between production generations.

🔌 Function

The O-ring seals the outside diameter of the propeller-shaft bearing carrier against the gearcase housing.

⚠️ Common Signs of Failure

• Milky or contaminated gear lubricant
• Gear oil leaking near the bearing carrier
• Water found during lower-unit pressure testing
• Flattened, hardened or cut O-ring surface
• Failure to hold gearcase pressure or vacuum

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 91351-ZW1-B02 (current documented Honda reference)

OEM / Related Numbers

• 91351ZW1B02
• 91351-ZW1-B01
• Seal size reference: 94 × 4.1mm

Aftermarket / Verified Equivalents

• RECMAR: REC91351-ZW1-B02

📦 Condition

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