• 420837559 Seadoo Balance Shaft | Genuine Used Part
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420837559 Seadoo Balance Shaft | Genuine Used Part

420837559 Seadoo Balance Shaft | Genuine Used Part

🔥 50% off all Used Parts - Limited Time 🔥

$255.00 AUD
$510.00 AUD $255.00 AUD
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🔧 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

Shipping & Delivery

Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.

Returns & Warranty

14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in the condition you received it for a refund or exchange. Full details in our Refunds & Returns policy.

Not sure this fits?

Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.

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