Yamaha 9.9 13.5 15 20 25 30 40 50 60 HP 4-Stroke Outboard Thermostat 60℃/140℉

Thermostat for Yamaha

This thermostat is a direct replacement for Yamaha 4-stroke outboard motors, designed to open at 60°C (140°F) to regulate engine temperature and prevent overheating.

Overview

This Yamaha outboard thermostat ensures optimal engine operating temperature by opening and closing as needed. It is a critical component for maintaining cooling system efficiency in 4-stroke outboards from 9.9 to 60 HP.

Built For Performance

• Precision-calibrated opening temperature of 60°C (140°F)
• Corrosion-resistant construction for marine environments
• Designed for exact fit in Yamaha 4-stroke outboard engines
• Ensures fast warm-up and consistent temperature control
• Replaces worn thermostats to prevent engine overheating

Fits These Machines

• for Yamaha 9.9 HP
• for Yamaha 13.5 HP
• for Yamaha 15 HP
• for Yamaha 20 HP
• for Yamaha 25 HP
• for Yamaha 30 HP
• for Yamaha 40 HP
• for Yamaha 50 HP
• for Yamaha 60 HP

On-The-Job Use

• Replacing a faulty thermostat in Yamaha 4-stroke outboards
• Maintaining proper engine temperature during long runs
• Preventing overheating in saltwater or freshwater use
• Routine maintenance for boat owners and marine technicians

Specs At A Glance

Good To Know

Q: Why does my outboard need a thermostat? A: The thermostat regulates coolant flow to keep the engine at an efficient temperature, reducing wear and improving fuel economy.

Q: How do I know if my thermostat is faulty? A: Signs include overheating, slow warm-up, or fluctuating temperature gauge readings; replace it if you notice these symptoms.

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