420950772 Head Gasket for Sea-Doo GTXS STD 155 1503 2017

Head Gasket for Sea-Doo

This head gasket for Sea-Doo GTXS STD 155 1503 models is an OEM cross-reference 420950772 sealing component that fits between the cylinder head and engine block to hold compression and separate coolant and oil passages.

Overview

This head gasket for Sea-Doo is built for the 1503 engine found in the GTXS STD 155 platform. The head gasket 420950772 seals the head-to-block interface, helping the engine hold compression and preventing coolant or oil cross-contamination. It suits riders and technicians servicing a 2017 Sea-Doo GTXS STD 155 1503.

Built For Performance

• OEM cross-reference part number 420950772 for correct fitment
• Multi-layer construction rated for high combustion pressure
• Precision-formed coolant and oil passage openings
• Heat-resistant materials for the 1503 engine's thermal load
• Maintains a tight head-to-block seal to protect compression
• Designed around the Sea-Doo 155 horsepower 1503 four-stroke engine

Fits These Machines

• for Sea-Doo GTXS STD 155 with 1503 engine, 2017

On-The-Job Use

• Top-end rebuilds after compression loss or overheating
• Cylinder head removal and reinstallation work
• Engine refresh on higher-hour 1503 powerplants
• Repairs following coolant or oil seepage at the head joint

Specs At A Glance

Good To Know

Q: Should head bolts be replaced along with this gasket? A: Many 1503 top-end repairs use torque-to-yield head bolts that are not meant for reuse, so check your service manual. Follow the specified torque sequence and stages during installation.

Q: Is this gasket reusable if the head comes off again? A: No, a head gasket is a single-use seal and must be replaced whenever the cylinder head is removed. Reusing it can lead to compression loss and coolant leaks.

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