Crankshaft Main Bearing for Sea-Doo GTI SE 170 1630 2020-2026

Crankshaft Main Bearing for Sea-Doo

This crankshaft main bearing supports the crankshaft in your Sea-Doo 1630 4-TEC engine, maintaining true rotation under load and guarding the crankcase against premature wear.

Overview

This crankshaft main bearing is a replacement engine bearing made for the Sea-Doo 1630 4-TEC platform, designed to hold the crankshaft steady inside the crankcase at sustained high RPM. It suits riders rebuilding a GTI SE 170 engine or refreshing bottom-end bearings on a newer machine. Choose this crankshaft main bearing when the original shows scoring, pitting, or play that puts the crank at risk.

Built For Performance

• Precision-ground rolling surface for consistent crankshaft support
• Hardened steel construction built to handle 1630 4-TEC operating loads
• Dimensional tolerances matched to the OEM bearing journal
• Rated for sustained high-RPM marine use
• Sold individually so you can replace only the bearings showing wear

Fits These Machines

• for Sea-Doo GTI SE 170 with the 1630 engine (2020-2026)

On-The-Job Use

• Bottom-end rebuilds on 1630 4-TEC equipped watercraft
• Crankshaft replacement jobs where bearings are refreshed at the same time
• Routine teardown inspections on high-hour GTI SE models
• Shop service work on Sea-Doo personal watercraft engines

Specs At A Glance

Good To Know

Q: How many main bearings does a 1630 4-TEC engine use? A: The 1630 4-TEC uses multiple main bearings along the crankshaft, so check your service manual and order the quantity your rebuild requires. Inspect every journal before assembly and replace any bearing showing wear.

Q: Can I replace just one main bearing? A: You can, but most builders replace the full set once the cases are split to avoid a second teardown. Measure crankshaft journal wear first to confirm the crank itself is still within spec.

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