420950772 Head Gasket for Sea-Doo RXT XRS 300 1630 2017-2022

Head Gasket for Sea-Doo RXT XRS 300 1630

This head gasket, part number 420950772, seals the cylinder head to the engine block for Sea-Doo RXT XRS 300 1630 models. It locks in combustion pressure and keeps coolant and oil separated for reliable performance. Note the OEM cross-reference 420950772 when matching your machine.

Overview

This head gasket for Sea-Doo RXT XRS 300 1630 keeps compression tight and fluids separated where the head meets the cylinder. Engineered as a direct replacement, this head gasket for Sea-Doo RXT XRS 300 fits 2017 through 2022 units with the 1630 engine. It suits riders and mechanics rebuilding a top end or chasing a blown seal on a personal watercraft.

Built For Performance

• Precision-cut port and coolant passage openings match the 1630 cylinder deck
• Multi-layer construction resists blowout under high cylinder pressure
• Seals combustion, oil, and coolant paths in one unit
• Torque-ready design to hold clamp load after heat cycles
• Replacement for OEM 420950772

Fits These Machines

• for Sea-Doo RXT XRS 300 1630 (2017-2022)
• for Sea-Doo RXT 300 1630 (2017-2022)
• for Sea-Doo RXP X 300 1630 (2017-2022)

On-The-Job Use

• Top-end rebuilds and head gasket replacement
• Freshwater and saltwater PWC operation
• Performance riding and recreational cruising
• Shop and DIY engine repair

Specs At A Glance

Good To Know

Q: Do I need to replace head bolts with this gasket? A: Follow the service manual for your Sea-Doo; many head bolts are torque-to-yield and should be replaced during a head gasket job. A: Torque the head in the sequence and value spec in the manual to avoid a repeat failure.

Q: Will this fit my 2019 RXT XRS 300? A: It is listed for 1630 engines from 2017 to 2022, but always verify your serial number and engine code before ordering. Check the OEM number 420950772 against your old gasket.

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