420834488 Starter Gear for Sea-Doo Challenger SE 215 1503 2007-2011

Starter Gear for Sea-Doo

The Starter Gear for Sea-Doo, part 420834488, engages the starter motor to turn over the 1503 engine so it fires and runs.

Overview

This Starter Gear for Sea-Doo is a direct replacement component for the 1503 engine used in Challenger and SE 215 models from 2007 through 2011. It transfers turning force from the starter motor to the engine flywheel so the powerplant spins up and starts reliably. Built for riders and shops servicing personal watercraft, this starter gear keeps the ignition sequence working as intended.

Built For Performance

• OEM cross-reference 420834488 for exact replacement matching
• Hardened tooth profile designed to mesh cleanly with the flywheel
• Heat-treated construction suited to repeated engine starts
• Direct-fit replacement for the original starter gear
• Precision machined for consistent engagement

Fits These Machines

• for Sea-Doo Challenger 215 1503, 2007
• for Sea-Doo Challenger 215 1503, 2008
• for Sea-Doo Challenger 215 1503, 2009
• for Sea-Doo Challenger 215 1503, 2010
• for Sea-Doo Challenger 215 1503, 2011
• for Sea-Doo SE 215 1503, 2007
• for Sea-Doo SE 215 1503, 2008
• for Sea-Doo SE 215 1503, 2009
• for Sea-Doo SE 215 1503, 2010
• for Sea-Doo SE 215 1503, 2011

On-The-Job Use

• Replacing a worn or stripped starter gear on 1503 engines
• Routine starting system maintenance
• Repairing hard-start or grinding-start conditions
• Shop or DIY engine service on Challenger and SE boats

Specs At A Glance

Good To Know

Q: What does this starter gear do? A: It meshes with the flywheel to spin the engine during starting, then disengages once the engine runs.

Q: How do I know if my starter gear needs replacing? A: Grinding, whining, or a starter that spins without turning the engine often points to a worn or stripped starter gear.

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