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

Exhaust Valve for Yamaha

The Exhaust Valve replaces OEM part 6S5-12121-00-00, controlling exhaust flow out of the engine so your Yamaha 222S 1800 keeps running clean and smooth.

Overview

The Exhaust Valve is a direct replacement component built to match the 6S5-12121-00-00 fitment used on Yamaha 222S 1800 boats. It regulates exhaust gas flow from the cylinder head so the engine breathes properly under load. This exhaust valve suits owners handling routine maintenance or a top end rebuild.

Built For Performance

• Cross-references OEM part number 6S5-12121-00-00 for a direct fit
• Heat resistant construction suited to high exhaust gas temperatures
• Precision ground seating face for a clean seal against the valve seat
• Manufactured to match the original valve dimensions and stem diameter
• Works with the standard valve guides and springs on the 222S 1800

Fits These Machines

• for Yamaha 222S 1800 (2023)

On-The-Job Use

• Top end engine rebuilds after valve damage or wear
• Routine valve service on Yamaha 222S 1800 boats
• Restoring compression lost to a burned or leaking exhaust valve
• Marine engine maintenance where OEM parts are no longer stocked

Specs At A Glance

Good To Know

Q: Do I need to replace valve seals at the same time? A: Yes, valve seals and guide checks are commonly done with an exhaust valve job, since the head is already apart. Reusing worn seals can cause oil consumption after the repair.

Q: Is this valve sold as a single unit? A: Yes, this listing covers one exhaust valve unless otherwise noted. Confirm your engine's cylinder count to order the correct quantity.

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