420664049 Camshaft Position Sensor for Sea-Doo Fish 18-170 1630 2025

Camshaft Position Sensor for Sea-Doo

The Camshaft Position Sensor for Sea-Doo, part number 420664049, monitors camshaft rotation and sends timing data to the engine control module for accurate fuel delivery and ignition.

Overview

This camshaft position sensor for Sea-Doo is the component that reports valve train timing back to the ECM. That signal keeps spark and fueling synchronized on the 1630 engine. It is aimed at riders servicing a Sea-Doo Fish 18-170 who want a direct replacement sensor, not a workaround.

Built For Performance

• Direct replacement for OEM part number 420664049
• Plug-and-play connector matches the factory harness
• Sealed housing resists moisture and engine bay heat
• Solid-state Hall effect sensing with no moving wear parts
• Stable signal output across the full RPM range

On-The-Job Use

• Restoring ignition timing on a 1630 equipped Sea-Doo
• Diagnosing no-start or rough-running conditions tied to sensor faults
• Routine replacement during top-end or timing service

Specs At A Glance

Good To Know

Q: How do I know the camshaft position sensor has failed? A: Common signs include a check engine light, hard starting, misfires, and sudden power loss on the water. A scan tool reading fault codes tied to cam or crank correlation confirms it quickly.

Q: Does this sensor need calibration after installation? A: No calibration is required on this engine family. Install it, clear any stored fault codes, and verify the signal reads correctly before heading out.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.