6S5-12121-00-00 Exhaust Valve for Yamaha 275SD 1800 2019-2026

Exhaust Valve for Yamaha

The Exhaust Valve for Yamaha is a direct replacement engine component that controls exhaust flow from the combustion chamber, cross-referenced to OEM part number 6S5-12121-00-00.

Overview

This exhaust valve for Yamaha marine engines restores proper sealing and exhaust flow in the cylinder head. The exhaust valve is built to OEM dimensions for a precise fit, making it a dependable replacement for worn or burned valves. It suits owners and mechanics servicing Yamaha 275SD 1800 models from 2019 through 2026.

Built For Performance

• Cross-referenced to OEM part number 6S5-12121-00-00 for direct replacement
• Manufactured to OEM dimensions for correct valve stem and head sizing
• Heat-resistant alloy construction suited to exhaust-side temperatures
• Precision-ground stem surface for smooth movement in the guide
• Sealing face machined for consistent contact with the valve seat

Fits These Machines

• for Yamaha 275SD 1800, 2019-2026

On-The-Job Use

• Cylinder head rebuilds and top-end service on Yamaha 1800 marine engines
• Replacing burned or leaking exhaust valves found during compression testing
• Routine valve clearance adjustment and valve train maintenance
• Marine engine repair shops handling Yamaha 275SD service work

Specs At A Glance

Good To Know

Q: How many exhaust valves does this listing include? A: This listing covers one exhaust valve unless the quantity option states otherwise. Confirm the quantity needed for your cylinder head before ordering.

Q: Should the valve seat and guide be inspected at the same time? A: Yes, worn guides or seats can shorten the life of a new exhaust valve. Measuring both during installation helps ensure a proper seal.

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