6S5-12121-00-00 Exhaust Valve for Yamaha 212 SS 1800 2012-2016

Exhaust Valve for Yamaha

The Exhaust Valve for Yamaha 212 SS 1800 is a direct replacement engine component, cross-referenced to 6S5-12121-00-00, that regulates exhaust flow out of the cylinder head to keep your marine engine running cleanly.

Overview

This exhaust valve for Yamaha replaces a worn or burned valve in the 1800 engine used by the 212 SS. A properly seated valve restores compression and exhaust scavenging, helping the engine idle smoothly and hold RPM under load. It suits boat owners and mechanics handling top-end service on a Yamaha 212 SS.

Built For Performance

• OEM cross-reference 6S5-12121-00-00 for accurate fitment matching
• Built from heat-resistant alloy steel to handle sustained high exhaust temperatures
• Precision-ground valve face for a clean seal against the valve seat
• Machined stem diameter for consistent clearance in the valve guide
• Designed for the 1800 marine engine platform

Fits These Machines

• for Yamaha 212 SS 1800 (2012-2016)

On-The-Job Use

• Top-end rebuilds after a burnt or leaking exhaust valve
• Compression loss diagnosis and repair
• Routine valve service on high-hour 1800 engines
• Cylinder head refresh during off-season maintenance

Specs At A Glance

Good To Know

Q: Do I need to replace valve seals and guides at the same time? A: It is good practice to inspect and replace valve seals and check guide wear whenever an exhaust valve is changed, since worn guides accelerate new valve wear.

Q: Should valves be lapped or re-seated after installation? A: New valves typically need to be lapped to the seat or the seat cut fresh so the face seals evenly and holds compression.

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