6JC-11181-00-00 Head Gasket for Yamaha 275SD 1800 2019-2026

Head Gasket for Yamaha

This head gasket, part number 6JC-11181-00-00, seals the cylinder head to the engine block on Yamaha 1800 series marine engines, keeping combustion pressure and coolant where they belong.

Overview

This head gasket for Yamaha is a direct-fit sealing component for the 1800 engine platform found in 275SD series boats. The head gasket for Yamaha sits between the cylinder head and block, maintaining a tight combustion seal and separating coolant passages under high compression. It is the right choice for rebuilders and boat owners replacing a blown or worn head gasket during top-end service.

Built For Performance

• Precision-cut to match the 1800 cylinder head and block mating surfaces
• Multi-layer construction designed to withstand high combustion temperatures
• Seals both combustion chambers and coolant passages in a single unit
• Engineered to original equipment dimensions for a drop-in fit
• Resists compression set for a long service life

Fits These Machines

• for Yamaha 275SD 1800 (2019-2026)

On-The-Job Use

• Top-end engine rebuilds on Yamaha 1800 marine powerplants
• Replacing a failed head gasket after overheating or compression loss
• Cylinder head removal and reinstallation during routine engine service
• Restoring proper compression and cooling performance on 275SD boats

Specs At A Glance

Good To Know

Q: Does this gasket cover the full 2019-2026 275SD production run? A: It is listed for the 275SD 1800 across that range, but confirm your exact model year and serial number before ordering.

Q: Can I reuse this gasket if I remove the head again? A: No, a head gasket should be replaced each time the cylinder head is removed to maintain a reliable combustion and coolant seal.

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