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

🚤 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

🔄 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

📦 Condition

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