421000076 Crankshaft Assembly for Sea-Doo Challenger 1800 800 1997-1999

Crankshaft Assembly for Sea-Doo

This crankshaft assembly, OEM cross-reference 421000076, is a replacement engine component that transfers piston force into rotational motion inside the Sea-Doo 800 engine.

Overview

The Crankshaft Assembly is a direct-fit engine component built for the Sea-Doo Challenger 1800. It converts the up and down motion of the pistons into the rotational power the jet drive needs, keeping the 800 engine running as designed. This crankshaft assembly suits owners and mechanics rebuilding or servicing a 1997 to 1999 Challenger 1800.

Built For Performance

• OEM cross-reference 421000076 for accurate matching
• Machined journals for consistent bearing fit
• Balanced construction to reduce engine vibration
• Built to handle the load of the Sea-Doo 800 engine
• Direct replacement for the original crankshaft assembly

Fits These Machines

• for Sea-Doo Challenger 1800 1997
• for Sea-Doo Challenger 1800 1998
• for Sea-Doo Challenger 1800 1999

On-The-Job Use

• Engine rebuilds on the Challenger 1800
• Bottom-end repair after bearing or rod failure
• Restoring a jet boat to running condition
• Seasonal maintenance for high-hour engines

Specs At A Glance

Good To Know

Q: Does this crankshaft assembly fit every Challenger 1800 model year listed? A: It is listed for the 1997 to 1999 Challenger 1800, but confirm your serial number before ordering.

Q: What else should be replaced during installation? A: New bearings and seals are commonly replaced alongside a crankshaft assembly for a complete bottom-end refresh.

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