Thermostat – Fits Yamaha 2-Stroke Outboards 3-250 HP (Replaces Yamaha 6E5-12411-02-00, Sierra 18-3540) 485HP use a measuring tape and

use a measuring tape and a straight edge (like a ruler) to create a light pencil or masking tape guideline on the hull before application

5 inches (343mm)

Position the new gasket correctly onto the cleaned surface

ensuring the flow arrow points in the correct direction (towards the engine)

Thermostat – Fits Yamaha 2-Stroke Outboards 3-250 HP (Replaces Yamaha 6E5-12411-02-00, Sierra 18-3540) 485HP use a measuring tape andProduct Details This replacement Thermostat Fits Yamaha 2 Stroke Outboards 3 250 HP is engineered to regulate engine temperature for optimal performance on a wide range of Yamaha outboards from 19842009. It ensures your engine operates within its designed temperature range, preventing overheating and improving fuel efficiency. It serves as a direct replacement for numerous Yamaha, Sierra, and Parsun part numbers, including the common 6E5 12411 02 00