420874846 Fuel Injector for Sea-Doo Challenger SE 310 1503 2010-2011

Fuel Injector for Sea-Doo Challenger / SE 310 1503

This fuel injector replaces OEM part 420874846 for the Sea-Doo Challenger and SE 310 1503, delivering the precise fuel spray these 2010-2011 models need to run clean and strong.

Overview

This fuel injector is a direct-fit replacement for the Sea-Doo Challenger and SE 310 1503 powered by the 1503 engine. It meters fuel into the combustion chamber so the engine idles smoothly, accelerates cleanly, and holds steady power on the water. Built for riders and mechanics servicing 2010-2011 Sea-Doo Challenger and SE 310 1503 machines who want dependable fueling without paying original equipment prices.

Built For Performance

• Direct replacement for OEM part number 420874846
• Precision-machined nozzle for a consistent, finely atomized fuel spray
• Sealed housing resists fuel varnish and corrosion
• Flow rate matched to the 1503 engine for balanced cylinder fueling
• Plug-and-play electrical connector for a straightforward install
• Tested for leak-free operation under normal marine fuel pressure

Fits These Machines

• for Sea-Doo Challenger 310 1503, 2010-2011
• for Sea-Doo SE 310 1503, 2010-2011

On-The-Job Use

• Replacing a clogged or failed injector causing a misfire or rough idle
• Restoring lost top-end power on the water
• Routine fuel system service on the 1503 engine
• Bringing a machine back to spec after long storage

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: No, it is an aftermarket fuel injector made to replace OEM part 420874846, not an original brand product.

Q: How many injectors should I replace at once? A: Many owners replace all injectors together so fuel delivery stays even across cylinders. Confirm your model and year before ordering.

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