Crankshaft Main Bearing for Sea-Doo RXT X 300 1630 2016-2023

Crankshaft Main Bearing for Sea-Doo

This crankshaft main bearing is a replacement engine component that supports the crankshaft inside the 1630 Rotax engine used in 2016-2023 Sea-Doo RXT X 300 watercraft, keeping the rotating assembly aligned and spinning smoothly under load.

Overview

This crankshaft main bearing is built to carry the radial loads of the 1630 engine found in 2016-2023 RXT X 300 models. As a crankshaft main bearing, it sits between the crank journals and the crankcase to hold clearances in spec and reduce friction at speed.

Built For Performance

• Precision ground surfaces for consistent journal clearance
• Hardened bearing material for high-RPM durability
• Designed as a direct replacement for the 1630 Rotax crankcase
• Withstands the sustained load of supercharged 300 HP operation
• Sold individually for targeted rebuilds

Fits These Machines

• for Sea-Doo RXT X 300 1630 (2016-2023)

On-The-Job Use

• Bottom-end rebuilds after bearing wear or crank damage
• Engine refresh on high-hour 1630 powerplants
• Routine service during full engine teardown
• Marine repair shops handling Sea-Doo PWC service

Specs At A Glance

Good To Know

Q: How many crankshaft main bearings does a 1630 engine need? A: A full crank rebuild typically uses a matched set of main bearings, so check your service manual and confirm the quantity needed before ordering.

Q: Should main bearings be replaced during a rebuild? A: Any time the crankcase is split for service, main bearings should be inspected and replaced if they show wear, scoring, or play.

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