421000076 Crankshaft Assembly for Sea-Doo SPX 800 1997-1999

Crankshaft Assembly for Sea-Doo

This crankshaft assembly is a direct replacement component for the Sea-Doo SPX 800, cross-referencing OEM part number 421000076, and it transfers engine power from the pistons to the driveline.

Overview

This crankshaft assembly is built for the Sea-Doo SPX 800 and restores the core rotating assembly of the engine. It converts piston motion into rotational force that drives the jet pump through the cases. Riders and mechanics rebuilding a 1997 to 1999 SPX 800 will find this crankshaft assembly fits the intended application.

Built For Performance

• Fits the Sea-Doo 800 engine platform
• Cross-references OEM part number 421000076
• Single-piece crank with connecting rods and bearings
• Balanced for smooth high-rpm operation
• Heat-treated journals for wear resistance

Fits These Machines

• for Sea-Doo SPX 800 1997
• for Sea-Doo SPX 800 1998
• for Sea-Doo SPX 800 1999

On-The-Job Use

• Engine rebuilds after bottom-end failure
• Restoring a lake or river personal watercraft
• Routine crank replacement during top-end service
• Race or recreation use on the SPX 800 hull

Specs At A Glance

Good To Know

Q: Can I install this in my SPX 800 myself? A: Installation requires splitting the cases and pressing bearings, so it is typically a job for an experienced mechanic. Confirm your engine code before ordering.

Q: Does it come with bearings and rods? A: The crankshaft assembly is supplied as a complete unit with rods and bearings for the Sea-Doo 800 engine. Verify the part number matches your existing crank.

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