# 420966570 Seadoo Crankshaft Position Sensor | Genuine Used Part

🔧 Product Description

  

Genuine Sea-Doo Crankshaft Position Sensor Ass'y - Part Number: 420966570

  

This genuine Sea-Doo crankshaft position sensor is used in the PTO cover and magneto assembly on Sea-Doo 4-TEC and ACE engines. It reads crankshaft position and speed so the ECU can control ignition timing, fuel injection and engine operation.

  

⚙️ Key Features

  

• Genuine Sea-Doo crankshaft position sensor assembly

• OEM part number 420966570

• Engine timing and speed input sensor

• Used in PTO cover / magneto assemblies

• Direct-fit OEM sensor for Sea-Doo 900 ACE, 1503 4-TEC and 1630 ACE engine-management systems

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• No available supersession chain

  

OEM / Related Numbers:

  

• 420966570

• 420966851 — related trigger wheel

• 420926300 — related retaining plate

• 420889726 — related stator plate

  

Aftermarket / Verified Equivalents:

  

• WSM: 004-521 crankshaft position sensor to suit 420966570

• AJSP: AM420966570 aftermarket crankshaft position sensor

  

🚤 Compatibility

  

Commonly used on:

  

• Sea-Doo engine-management / crank position sensing systems

  

Typically suits:

  

• Engine models:

• GTI 130 / GTI SE 130 — 1503 4-TEC electrical system

• GTI SE 155 / GTI LTD 155 — 1503 4-TEC electrical system

• GTI SE 170 — 1630 ACE electrical system

• GTS 130 / GTS 90 — 1503 4-TEC / 900 ACE electrical system

• GTR 215 / GTR 230 — 1503 4-TEC electrical system

• GTX 155 / GTX 170 / GTX 215 / GTX 230 / GTX 260 / GTX 300 — electrical system

• RXP 215 / RXP-X 255 / RXP-X 260 / RXP-X 300 — electrical system

• RXT 215 / RXT-X 255 / RXT-X 260 / RXT-X 300 — electrical system

• SPARK 900 ACE / SPARK 900 HO ACE — electrical system

• FISH PRO 155 / FISH PRO 170 / WAKE 155 / WAKE 170 / WAKE PRO 230 — electrical system

• Challenger / Speedster / Sportster 4-TEC boat engines using crankshaft position sensor 420966570

  

• HP Range: Approximately 90HP - 300HP

• Engine Type: Sea-Doo Rotax 900 ACE / 1503 4-TEC / 1630 ACE Engine Management System

• Year Range: Approximately 2006 - 2023

  

🔌 Function

  

The crankshaft position sensor sends crank position and engine speed information to the ECU so ignition and fuel injection can be timed correctly.

  

Common signs of failure:

  

• No-start condition

• Intermittent engine cut-out

• Crank sensor fault code

• No RPM signal during cranking

• Misfire, rough running or limp-mode symptoms

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 42.5 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 | 42.50 AUD | In stock |

## Images

- 420966570 Seadoo Crankshaft Position Sensor | Genuine Used Part
- 420966570 Seadoo Crankshaft Position Sensor | Genuine Used Part
- 420966570 Seadoo Crankshaft Position Sensor | Genuine Used Part
- 420966570 Seadoo Crankshaft Position Sensor | Genuine Used Part
- 420966570 Seadoo Crankshaft Position Sensor | Genuine Used Part
- 420966570 Seadoo Crankshaft Position Sensor | Genuine Used Part
- 420966570 Seadoo Crankshaft Position Sensor | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/420966570-seadoo-crankshaft-position-sensor-genuine-used-part)
> Updated: 2026-07-02