Crankshaft Main Bearing for Sea-Doo RXT P XRS 300 1630 2018

Crankshaft Main Bearing for Sea-Doo

This crankshaft main bearing is a replacement engine component that supports the crankshaft inside the crankcase, helping it spin true under load in Sea-Doo RXT P XRS 300 1630 watercraft.

Overview

This crankshaft main bearing is built to carry the rotating load of the crankshaft in a Sea-Doo RXT P XRS 300 1630 engine. It helps maintain proper journal clearance so the crank turns smoothly at high rpm. A solid choice for rebuilders and riders servicing a 2018 Sea-Doo RXT P XRS 300 1630 crankshaft assembly.

Built For Performance

• Precision-machined to hold consistent journal clearance
• Hardened bearing surface resists wear under high rpm
• Built to handle the thrust and radial loads of a 1630 engine crankshaft
• Direct-fit replacement for the crankshaft main bearing position
• Suited to rebuild and refresh work on 2018 Sea-Doo RXT P XRS 300 1630 powerplants

Fits These Machines

• for Sea-Doo RXT P XRS 300 1630, 2018

On-The-Job Use

• Crankshaft rebuilds on 2018 Sea-Doo RXT P XRS 300 1630 engines
• Bottom-end refresh during engine tear-down
• Restoring proper crank support after bearing wear

Specs At A Glance

Good To Know

Q: How many main bearings does a crankshaft rebuild need? A: A crankshaft main bearing set is typically sized to the number of main journals in the engine, so check your service manual for the exact count. Replace worn bearings as a set for even load distribution.

Q: Can I reuse old main bearings? A: Reusing worn main bearings risks excess clearance, low oil pressure, and crank damage, so fresh bearings are advised during any rebuild. Always verify journal condition and clearance before assembly.

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