# 420254329 420254316 420854594 Seadoo Rocker Arm Assy | Genuine Used Part

🔧 Product Description

  

Genuine Sea-Doo Rocker Arm Assembly - Part Numbers: 420254329, 420254316, 420854594

  

This genuine Sea-Doo rocker arm assembly includes exhaust rocker arms, inner rocker arms and the rocker arm shaft used in the valve train on Rotax 4-TEC cylinder head assemblies. The assembly transfers camshaft movement to the valves for correct intake and exhaust valve operation.

  

⚙️ Key Features

  

• Genuine Sea-Doo rocker arm assembly

• OEM part numbers 420254329, 420254316 and 420854594

• Includes exhaust rocker arms, inner rocker arms and rocker arm shaft

• Factory valve-train components for 4-TEC cylinder head assemblies

• Direct-fit OEM top-end components for listed Sea-Doo 4-TEC engines

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• No available supersession chain

  

OEM / Related Numbers:

  

• 420254329 — rocker arm, exhaust

• 420254316 — rocker arm, inner

• 420854594 — rocker arm shaft

  

Aftermarket / Verified Equivalents:

  

• SBT: 46-112-75 — intake / inner rocker arm replacement for 420254316

  

🚤 Compatibility

  

Commonly used on:

  

• Sea-Doo Rotax 4-TEC cylinder head / valve train assemblies

  

Typically suits:

  

• Engine models:

• GTX 4-TEC / GTX 4-TEC LTD / GTX 4-TEC SC — 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

• GTS 130 — 2011-2016

• GTR 215 / GTR 230 — 2012-2018

• GTX 155 / GTX S 155 — 2007-2018

• GTX 215 / GTX LTD 215 — 2007-2016

• GTX LTD iS 260 — 2009-2016

• RXP-X 255 / RXP-X 260 — 2008-2015

• RXT-X 255 / RXT-X 260 — 2008-2015

• WAKE 155 — 2006-2018

• WAKE PRO 215 / WAKE PRO 230 — 2009-2018

• Challenger / Speedster / Sportster 4-TEC boat engines using the 1503 cylinder head valve train

  

• HP Range: Approximately 130HP - 260HP

• Engine Type: Sea-Doo Rotax 1503 4-TEC Cylinder Head / Valve Train Assembly

• Year Range: Approximately 2002 - 2018

  

🔌 Function

  

The rocker arms and rocker shaft transfer camshaft movement to the intake and exhaust valves so the engine can open and close the valves at the correct time.

  

Common signs of failure:

  

• Valve train ticking or knocking

• Worn rocker arm roller or contact surfaces

• Excessive rocker shaft wear

• Misfire or poor compression from valve actuation issues

• Metal debris or abnormal wear inside cylinder head

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 725.0 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Sea-Doo Parts | Jet Ski Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 725.00 AUD | In stock |

## Images

- 420254329 420254316 420854594 Seadoo Rocker Arm Assy | Genuine Used Part
- 420254329 420254316 420854594 Seadoo Rocker Arm Assy | Genuine Used Part
- 420254329 420254316 420854594 Seadoo Rocker Arm Assy | Genuine Used Part
- 420254329 420254316 420854594 Seadoo Rocker Arm Assy | Genuine Used Part
- 420254329 420254316 420854594 Seadoo Rocker Arm Assy | Genuine Used Part
- 420254329 420254316 420854594 Seadoo Rocker Arm Assy | Genuine Used Part
- 420254329 420254316 420854594 Seadoo Rocker Arm Assy | Genuine Used Part
- 420254329 420254316 420854594 Seadoo Rocker Arm Assy | Genuine Used Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/420254329-420254316-420854594-seadoo-rocker-arm-assy-genuine-used-part)
> Updated: 2026-07-02