Crankshaft Main Bearing for Sea-Doo GTX STD 300 1630 2021-2026

Crankshaft Main Bearing for Sea-Doo GTX STD 300 1630

This crankshaft main bearing is a replacement engine component that supports the crankshaft inside the 1630cc Rotax engine used in the Sea-Doo GTX STD 300, helping maintain proper alignment and smooth rotation under load.

Overview

This crankshaft main bearing is built to support the crankshaft in the 1630cc engine found in the Sea-Doo GTX STD 300. The crankshaft main bearing helps hold the crank in position so it spins true through the full rpm range. It is intended for riders and mechanics replacing worn bearings during a rebuild or top-to-bottom engine service.

Built For Performance

• Supports the crankshaft to keep rotation true and centered
• Designed for the 1630cc Rotax engine platform
• Helps reduce vibration and bearing play under load
• Suits rebuild, refresh, and service work
• Built from bearing-grade materials for marine use

Fits These Machines

• for Sea-Doo GTX STD 300 1630, 2021-2026
• for Sea-Doo GTX STD 230 1630, 2020-2026

On-The-Job Use

• Crankshaft rebuilds on 1630cc personal watercraft engines
• Bearing replacement during engine teardown
• Routine service to restore smooth crank rotation
• Shop and home garage rebuild projects

Specs At A Glance

Good To Know

Q: How many bearings do I need for a full service? A: The quantity required depends on your engine configuration, so count the main bearing positions in your 1630cc crankcase before ordering. Many rebuilders replace all main bearings at once to keep wear even.

Q: Do I need to measure clearances during install? A: Yes, crankshaft main bearings should be checked for running clearance with a suitable gauge before assembly. Confirm the spec in your service manual for the exact engine and year.

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