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420837559 Seadoo Balance Shaft | Genuine Used Part

420837559 Seadoo Balance Shaft | Genuine Used Part

$510.00 AUD
$510.00 AUD
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Low stock: 1 left

🔧 Product Description

Genuine Sea-Doo Balance Shaft Ass'y - Part Number: 420837559

This genuine Sea-Doo balance shaft assembly is used in the crankshaft, pistons and balance shaft assembly on Sea-Doo 4-TEC engines. It counterbalances engine vibration and helps the Rotax 3-cylinder engine run smoothly.

⚙️ Key Features

  • Genuine Sea-Doo balance shaft assembly
  • OEM part number 420837559
  • Factory engine balance shaft component
  • Related earlier references include 290837555 and 420837555
  • Direct-fit OEM shaft for listed Sea-Doo 4-TEC engine assemblies

🚤 Compatibility

Commonly used on

  • Sea-Doo Rotax 4-TEC crankshaft, piston and balance shaft assemblies

Typically suits

  • Engine models:
  • GTX 4-TEC / GTX LTD / GTX Supercharged — 2002-2006
  • RXP 215 — 2004-2010
  • RXT 215 — 2005-2010
  • GTI 130 / GTI SE 130 — 2006-2018
  • GTI SE 155 / GTI LTD 155 — 2006-2018
  • GTR 215 / GTR 230 — 2012-2018
  • GTX 155 / GTX 215 / GTX 260 — 2007-2018
  • RXP-X 255 / RXP-X 260 — 2008-2015
  • RXT-X 255 / RXT-X 260 — 2008-2015
  • WAKE 155 / WAKE PRO 215 / WAKE PRO 230 — 2006-2018
  • Challenger / Sportster / Speedster 4-TEC engine assemblies
  • HP Range: Approximately 130HP - 260HP
  • Engine Type: Sea-Doo Rotax 1503 4-TEC Crankshaft / Balance Shaft Assembly
  • Year Range: Approximately 2002 - 2018

🔌 Function

The balance shaft reduces vibration from the three-cylinder engine layout by counteracting rotating and reciprocating forces inside the engine.

⚠️ Common Signs of Failure

  • Increased engine vibration
  • Bearing or shaft noise
  • Metal debris in oil
  • Damaged balance shaft gear or surfaces
  • Engine vibration after incorrect timing or assembly

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 420837559 → Related to 420837555
  • 420837555 → Related to 290837555
  • 290837555 (earlier OEM reference)

OEM / Related Numbers

  • 420837559
  • 420837555
  • 290837555
  • 420933442 — related half bushing
  • 420933470 — related half-ring
  • 420933475 — related half-ring

Aftermarket / Verified Equivalents

  • No aftermarket equivalent

📦 Condition

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