1503 Complete Crankshaft Assembly for Sea-Doo Challenger S 2 x 155 2012

Complete Crankshaft Assembly for Sea-Doo Challenger S 2 x 155 1503

This complete crankshaft assembly is a direct-fit replacement for the Sea-Doo Challenger S 2 x 155 1503 engine, providing the core rotating assembly that turns piston power into the drive needed at the impeller.

Overview

This complete crankshaft assembly is manufactured for the Sea-Doo Challenger S 2 x 155 1503, matching the naturally aspirated 1503 4-TEC engine used in the 2012 model year. The crankshaft assembly carries the connecting rods and converts combustion into rotation, forming the backbone of the lower end. It is intended for rebuilders, marine shops, and owners doing a full bottom-end refresh.

Built For Performance

• Complete assembly ships with the crankshaft and fitted components for a lower-end rebuild
• Balanced for smooth operation in the naturally aspirated 1503 4-TEC engine
• Machined journals sized for standard bearings in the 155 hp 1503 platform
• Hardened steel construction built to handle sustained marine rpm
• Direct-fit replacement for the Sea-Doo Challenger S 2 x 155 crankshaft position

Fits These Machines

• for Sea-Doo Challenger S 2 x 155, 2012

On-The-Job Use

• Bottom-end rebuilds after bearing wear or crank damage on the 1503 4-TEC
• Restoring a Challenger S 2 x 155 that has lost compression from a worn crank
• Marine shop service on the 2012 naturally aspirated 1503 engine
• Refreshing the rotating assembly ahead of a new boating season

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: This is an aftermarket complete crankshaft assembly made to fit Sea-Doo Challenger S 2 x 155 1503 engines, not an original factory part. Confirm your engine code and model year before ordering.

Q: Should I replace bearings with this crankshaft? A: New bearings matched to the journal sizes are recommended during any bottom-end rebuild. Check clearances and verify free rotation before closing up the engine.

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