6S5-12121-00-00 Exhaust Valve for Yamaha 252SE 1900 2024-2026

Exhaust Valve for Yamaha

This exhaust valve, reference 6S5-12121-00-00, regulates exhaust flow in the 1900 engine used across Yamaha 252SE models from 2024 to 2026.

Overview

This exhaust valve is a replacement engine component built to control exhaust gas flow on Yamaha 252SE boats powered by the 1900 engine. The exhaust valve cross-references 6S5-12121-00-00, giving owners a clear match for service and rebuild work. It suits marine mechanics and boat owners handling valve train maintenance on 2024 through 2026 models.

Built For Performance

• Cross-references OEM part 6S5-12121-00-00 for straightforward matching
• Constructed from heat-resistant alloy suited to exhaust temperatures
• Machined stem and head for consistent sealing in the cylinder head
• Built to withstand continuous marine engine duty cycles
• Direct-fit dimensions for the 1900 four-stroke engine family

Fits These Machines

• for Yamaha 252SE 1900, 2024-2026

On-The-Job Use

• Top-end engine rebuilds and valve service
• Marine repair shops handling Yamaha jet boat engines
• Restoring proper compression and exhaust sealing
• Scheduled maintenance on high-hour 1900 engines

Specs At A Glance

Good To Know

Q: How many exhaust valves does my engine need? A: Valve counts vary by cylinder head design, so check your service manual for the exact quantity required for your 1900 engine before ordering.

Q: Should exhaust valves be replaced in full sets? A: Many technicians replace all valves in the affected head at once to keep wear even, and lapping or seat work is typically recommended alongside replacement.

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