Crankshaft Main Bearing for Sea-Doo GTX STD 155 1503 2017-2018

Crankshaft Main Bearing for Sea-Doo

This crankshaft main bearing is a replacement engine component that supports the crankshaft inside the 1503 engine cases, helping it spin true at high RPM.

Overview

This crankshaft main bearing is built as a direct-fit replacement for the 1503 engine used across the Sea-Doo GTX STD 155 lineup. It carries the load of the rotating crankshaft, keeping runout within tolerance so the engine stays smooth under throttle. A dependable choice for rebuilders and DIY mechanics refreshing a worn bottom end.

Built For Performance

• Precision-ground rolling elements for consistent crankshaft support
• Hardened steel races built to handle sustained high RPM operation
• Designed to seat within the 1503 engine case bores
• Rated for marine duty where heat and load cycles are constant
• Sold as a replacement bearing for crankshaft rebuild service

Fits These Machines

• for Sea-Doo GTX STD 155 1503 2017
• for Sea-Doo GTX STD 155 1503 2018

On-The-Job Use

• Crankshaft rebuilds on 1503 powered personal watercraft
• Bottom-end refreshes on high-hour Sea-Doo engines
• Shop or home garage engine service
• Preventive replacement during full engine teardown

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: No, it is an aftermarket replacement main bearing made to fit the listed 1503 engine. Always confirm your engine code and case specification before ordering.

Q: How many main bearings does a rebuild need? A: A typical crankshaft rebuild uses multiple main bearings, so verify your service manual before ordering. Bearing position and count vary by engine configuration.

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