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420856504 Seadoo Vent Valve | Genuine Used Part

420856504 Seadoo Vent Valve | Genuine Used Part

$90.00 AUD
$90.00 AUD
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🔧 Product Description

Genuine Sea-Doo Vent Valve Ass'y - Part Number: 420856504

This genuine Sea-Doo vent valve assembly is used in the cylinder head and crankcase ventilation system on selected supercharged Sea-Doo 4-TEC engines. It helps control engine breathing and oil vapour flow through the factory vent system.

⚙️ Key Features

  • Genuine Sea-Doo vent valve assembly
  • OEM part number 420856504
  • Engine ventilation / breather valve component
  • Supersedes earlier OEM vent valve reference 420856502
  • Direct-fit OEM component for listed 4-TEC cylinder head ventilation assemblies

🚤 Compatibility

Commonly used on

  • Sea-Doo 4-TEC cylinder head ventilation assemblies

Typically suits

  • Engine models:
  • 2009 GTX Limited iS 255 — Cylinder Head
  • 2009 RXT iS 255 — Cylinder Head
  • 2010 GTX iS 215 — Cylinder Head
  • 2010 GTX Limited iS 260 — Cylinder Head
  • 2010 RXT 215 — Cylinder Head
  • 2010 RXT iS 260 — Cylinder Head
  • 2010 RXT-X 260 & X RS — Cylinder Head
  • 2010 WAKE PRO 215 — Cylinder Head
  • 2011 GTX 215 — Cylinder Head
  • 2011 GTX iS 215 — Cylinder Head
  • 2011 GTX Limited iS 260 — Cylinder Head
  • 2011 RXT 260 & RS — Cylinder Head
  • 2011 RXT iS 260 — Cylinder Head
  • 2011 RXT-X 260 & RS — Cylinder Head
  • 2011 WAKE PRO 215 — Cylinder Head
  • 2012 GTX 215 — Cylinder Head
  • 2012 GTX Limited iS 260 — Cylinder Head
  • 2012 RXT 260 / RXT-X 260 — Cylinder Head
  • 2012 WAKE PRO 215 — Cylinder Head
  • HP Range: Approximately 215HP - 260HP
  • Engine Type: Sea-Doo Rotax 1503 4-TEC Supercharged Cylinder Head / Ventilation System
  • Year Range: Approximately 2009 - 2012

🔌 Function

The vent valve helps regulate crankcase and cylinder head ventilation, allowing vapour flow through the breather system while helping control oil carry-over.

⚠️ Common Signs of Failure

  • Excess oil vapour in intake system
  • Oil residue around breather hoses
  • Poor crankcase ventilation
  • Split or damaged valve body
  • Rough running caused by breather-system leakage

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 420856504 → Supersedes 420856502
  • 420856502 (earlier OEM reference)

OEM / Related Numbers

  • 420856504
  • 420856502

Aftermarket / Verified Equivalents

  • WSM: replacement vent valve assembly to suit 420856504 / 420856502 applications

📦 Condition

  • Genuine used part
  • Removed from running engine where applicable
  • In good working condition unless otherwise stated
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