6S5-12121-00-00 Exhaust Valve for Yamaha 222SD 1800 2023

Exhaust Valve for Yamaha

This exhaust valve (OEM cross-reference 6S5-12121-00-00) controls exhaust gas flow in the cylinder head, sealing combustion and releasing spent gases on Yamaha 222SD 1800 boats from 2023.

Overview

This exhaust valve is a direct-fit engine component that seals against the valve seat during combustion and opens to release exhaust gases on the power stroke. Built to OEM cross-reference 6S5-12121-00-00, this exhaust valve suits Yamaha 222SD 1800 marine engines from 2023 and serves boat owners handling valve replacement or top-end rebuilds.

Built For Performance

• Manufactured to OEM cross-reference 6S5-12121-00-00 for dimensional accuracy
• Heat-resistant alloy construction suited to sustained exhaust temperatures
• Precision-ground stem for smooth movement in the valve guide
• Hardened face for reliable sealing against the valve seat
• Built to withstand the constant thermal cycling of marine engine operation

Fits These Machines

• for Yamaha 222SD 1800, 2023

On-The-Job Use

• Top-end engine rebuilds and valve replacement
• Cylinder head service on Yamaha 222SD 1800 boats
• Restoring compression and exhaust flow after valve wear or damage

Specs At A Glance

Good To Know

Q: Is this an original Yamaha part? A: This is an aftermarket exhaust valve built to OEM cross-reference 6S5-12121-00-00, not an original Yamaha product. Confirm your engine's required part number before ordering.

Q: How many exhaust valves does my engine need? A: Valve count depends on your engine's cylinder configuration, so check your service manual to order the correct quantity. Inspect related valve train components at the same time.

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