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91251-ZW1-B04 Honda Marine Seal | Genuine OEM Outboard Part

91251-ZW1-B04 Honda Marine Seal | Genuine OEM Outboard Part

$12.92 AUD
$12.92 AUD
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🔧 Product Description

Genuine Honda Vertical Shaft Water Seal 23 × 36 × 6 mm - Part Number: 91251-ZW1-B04

A genuine Honda 23 × 36 × 6 mm radial water seal used around the vertical driveshaft on selected BF75A, BF90A, BF115A and BF130A gearcases. Two seals are commonly installed in opposed orientation to separate water from the gear-lubricant cavity.

⚙️ Key Features

  • Genuine Honda radial water/vertical-shaft seal
  • Nominal dimensions: 23 × 36 × 6 mm
  • Correct spring-loaded sealing lip for the ZW1 gearcase family
  • Two seals are commonly required per lower-unit assembly; sold individually

🚤 Compatibility

Commonly used on

  • Honda BF75A
  • Honda BF90A
  • Honda BF115A
  • Honda BF130A
  • Selected early BF135A/BF150A gearcases only where the diagram specifies 91251-ZW1-B04

Typically suits

  • HP Range: 75-150 HP, gearcase revision dependent
  • Engine Type: Inline-four four-stroke outboard lower unit
  • Year Range: Approximately 1997 onward, model dependent
  • Serial / Identification Range: Confirm the complete frame serial, 23 × 36 × 6 mm dimensions and original seal number. Later ZY6 gearcases use a different 23 × 36 × 8 mm seal.

🔌 Function

Seals the vertical driveshaft to prevent cooling water entering the gearcase and gear lubricant escaping through the driveshaft opening.

⚠️ Common Signs of Failure

  • Milky or water-contaminated gear lubricant
  • Gear oil leaking around the driveshaft or water-pump base
  • Seal lips are cut, hardened or installed incorrectly
  • Driveshaft is grooved or corroded at the seal contact area

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 91251-ZW1-B04 → supersedes 91251-ZW1-B03
  • 91251-ZW1-B03 → follows earlier 91251-ZW1-B02 revision in the applicable seal family

OEM / Related Numbers

  • 91251-ZW1-B04
  • 91251-ZW1-B03
  • 91251-ZW1-B02

Aftermarket / Verified Equivalents

  • Sierra Marine: 18-1820
  • Recmar: REC91251-ZW1-B04

📦 Condition

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