# 67C-85790-00-00 Yamaha Thermosensor Assembly | Genuine Used Part

🔧 Product Description

  

Genuine Yamaha Thermosensor Assembly - Part Number: 67C-85790-00-00

  

A genuine Yamaha thermosensor assembly used on selected Yamaha F30 and F40 four-stroke outboards. This sensor monitors engine temperature and provides temperature input for the engine protection and warning system where the original 67C sensor number matches.

  

⚙️ Key Features

  

• Genuine Yamaha thermosensor assembly

• Correct OEM part number 67C-85790-00-00

• Also listed as 67C-85790-00

• Engine temperature sensor / thermosensor assembly

• Used on selected Yamaha F30 and F40 four-stroke outboards

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 67C-85790-00 Yamaha thermosensor reference

• 67C-85790-00-00 full Yamaha thermosensor assembly reference

  

OEM / Related Numbers:

  

• 67C-85790-00-00

• 67C857900000

• 67C-85790-00

• 67C8579000

• Thermosensor assy

• Thermosensor assembly

• Temperature sensor

• Engine temperature sensor

• Overheat sensor

• F30 / F40 thermosensor

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha F30 / F40 four-stroke engine temperature monitoring systems

  

Typically suits:

  

• Engine models:

• Yamaha F30 applications using 67C-85790-00-00

• Yamaha F30A applications using 67C-85790-00-00

• Yamaha F40 applications using 67C-85790-00-00

• Yamaha F40 67C-series four-stroke applications

• Yamaha F30 / F40 electrical-parts diagrams where the thermosensor is listed as 67C-85790-00-00

  

• HP Range: 30HP - 40HP

• Engine Type: Yamaha four-stroke outboard engine temperature sensor system

• Year Range: model-code controlled

• Serial Note: Match by exact Yamaha model code, serial number, sensor plug, mounting thread / location and electrical-parts diagram before installation.

  

🔌 Function

  

The thermosensor monitors engine temperature and sends a temperature signal to the ignition / control system for overheat warning and engine protection functions.

  

Common signs of failure:

  

• Overheat warning when engine is not overheating

• No overheat warning during sensor test

• Engine protection mode triggered incorrectly

• Temperature reading missing on compatible systems

• Damaged or corroded sensor connector

• Sensor resistance out of specification

• Fault clears when a known-good thermosensor is fitted

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 30.0 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Electronic Components | ECU CDI & Electrical Parts

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 30.00 AUD | In stock |

## Images

- 67C-85790-00-00 Yamaha Thermosensor Assembly | Genuine Used Part
- 67C-85790-00-00 Yamaha Thermosensor Assembly | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/67c-85790-00-00-yamaha-thermosensor-assembly-genuine-used-part)
> Updated: 2026-07-05