6S5-12121-00-00 Exhaust Valve for Yamaha 212 LTD 1800 2017-2019

Exhaust Valve for Yamaha 212 LTD 1800

This exhaust valve, OEM cross-reference 6S5-12121-00-00, controls exhaust gas flow out of the cylinder head on Yamaha 212 LTD 1800 boats.

Overview

This exhaust valve is a direct-fit replacement component for the Yamaha 212 LTD 1800, cross-referenced to OEM part number 6S5-12121-00-00. The exhaust valve seals and releases combustion gases from the cylinder during the exhaust stroke, helping the engine run cleanly and efficiently. It is intended for boat owners and marine mechanics performing top-end service or rebuilding the cylinder head on a Yamaha 212 LTD 1800.

Built For Performance

• OEM cross-reference 6S5-12121-00-00 for straightforward replacement
• Machined valve head for a consistent seal against the valve seat
• Heat-resistant steel construction suited to exhaust-side temperatures
• Precise stem diameter for correct fit in the valve guide
• Designed to match factory valve dimensions for the 1800 engine

Fits These Machines

• for Yamaha 212 LTD 1800, 2017-2019

On-The-Job Use

• Cylinder head rebuilds and top-end refreshes
• Replacing a burnt or leaking exhaust valve
• Routine engine service on Yamaha 212 LTD 1800 boats

Specs At A Glance

Good To Know

Q: Is this an original Yamaha part? A: This is an aftermarket exhaust valve that cross-references OEM number 6S5-12121-00-00, not an original Yamaha product. Confirm the part number matches your engine before ordering.

Q: Should valves be replaced in sets? A: Exhaust valves are often serviced together with related valve train components during a head rebuild. Check the condition of the guides and seats 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.