Yamaha 68V-12413-00-9S Thermostat Cover

The Yamaha 68V-12413-00-9S Thermostat Cover is a genuine OEM replacement part designed to maintain proper engine temperature regulation on compatible Yamaha outboard engines. As the cover that seals over the thermostat housing, it plays a critical role in ensuring coolant flows correctly and that the thermostat operates within its intended parameters. A cracked, corroded, or improperly sealing cover can lead to overheating or inconsistent engine temperatures, making timely replacement essential for reliable operation.

This particular cover features an improved electro-deposited paint finish that enhances its resistance to corrosion — a key consideration for marine parts constantly exposed to water, salt, and humidity. Because it is a genuine Yamaha component, it is manufactured to the same specifications as the original factory part, ensuring proper gasket alignment and bolt patterns without the need for modification. Yamaha recommends verifying fitment by providing your VIN or hull identification number to a dealer before purchasing, as the 68V-series part numbers correspond to specific engine models and production years.