420950772 Head Gasket for Sea-Doo GTX LTD 325 1630 2025-2026

Head Gasket for Sea-Doo

This head gasket for Sea-Doo seals the cylinder head to the engine block, restoring compression on the 1630 engine used in GTX LTD 325 models, and carries OEM cross-reference 420950772.

Overview

This head gasket for Sea-Doo is a direct-fit sealing component for the 1630 engine found in the GTX LTD 325. It seals the combustion chamber and coolant passages between the cylinder head and block so compression and cooling stay where they belong. A solid choice for riders replacing a blown or weeping gasket during a top-end service.

Built For Performance

• Precision-cut to match the 1630 engine combustion chamber and coolant passage layout
• Multi-layer construction designed to handle the cylinder pressures of a high-output marine engine
• Seals both compression and coolant paths in one gasket
• Cross-references OEM part number 420950772
• Installs in the stock location without machining or modification

Fits These Machines

• for Sea-Doo GTX LTD 325 (2025-2026)

On-The-Job Use

• Top-end rebuilds after overheating or gasket failure
• Freshwater and saltwater riding where the 1630 engine sees sustained load
• Replacing a leaking head gasket before it causes coolant loss or compression drop
• Shop and DIY teardown work on the GTX LTD 325 platform

Specs At A Glance

Good To Know

Q: Do I need to torque the head in stages after fitting this gasket? A: Yes, follow the factory torque sequence and values for the 1630 engine to avoid uneven clamping that can cause a repeat failure. Replace head bolts if the service manual calls for new ones.

Q: Can this gasket be reused if I pull the head again? A: No, a crushed head gasket is a single-use item and should be replaced any time the head is removed. Reusing it risks 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.