Yamaha - Thermosensor Assembly - Engine Temperature Monitoring - 6CJ-85790-00-00

Overview

When you spend enough time around Yamaha outboards, you learn pretty quickly that temperature control is everything. The Thermosensor Assembly 6CJ-85790-00-00 keeps track of engine heat and sends that information to the engine’s monitoring system so the motor knows when things are running right. It’s a small component, but it plays a big role in protecting the engine from overheating. When the sensor is working properly, you get accurate readings and the confidence that your motor is operating within a safe range.

Key Features

• Accurate Temperature Monitoring – Measures engine temperature and communicates data to the engine management system.

• Yamaha Engineered Fit – Built to Yamaha specifications for proper integration with factory cooling and monitoring systems.

• Reliable Sensor Response – Delivers consistent readings that help the engine react quickly to changing temperatures.

• Marine-Grade Durability – Designed to withstand vibration, moisture, and the harsh conditions found in marine environments.

• Direct Replacement Design – Installs in the factory sensor location without modifications.

Engine & Boat Compatibility

The Yamaha Thermosensor Assembly 6CJ-85790-00-00 is designed for Yamaha outboard engines that use electronic engine monitoring systems to track temperature and cooling performance.

Commonly used in modern Yamaha outboards where accurate temperature feedback is required for engine protection and system diagnostics. Always confirm fitment using your engine model and parts diagram before installation.

FAQ

What happens if a thermosensor fails?
A failing sensor may trigger warning alarms, display incorrect temperature readings, or cause the engine to enter a protective mode.

Can a faulty sensor cause overheating?
The sensor itself does not cause overheating, but incorrect readings can prevent the system from properly warning the operator.

Is installation difficult?
Most installations are straightforward since the sensor threads directly into the engine. Just be careful not to overtighten during installation.

Do thermosensors wear out over time?
Yes, exposure to heat cycles, moisture, and vibration can eventually affect sensor accuracy after years of use.

Should I check anything else when replacing this sensor?
It is a good idea to inspect wiring connectors and surrounding cooling components while the sensor is removed.