# 855676 Mercury MerCruiser Thermostat | Genuine Quicksilver OEM Part

## 🔧 Product Description

**Genuine Quicksilver FourStroke Thermostat - Part Number: 855676**

A genuine Quicksilver thermostat used in selected Mercury and Mariner FourStroke cooling systems. This thermostat family is commonly associated with 60°C / 140°F FourStroke outboard applications and is used where the parts diagram specifies thermostat 855676 or the related 855676003 / 825212 service family.

## ⚙️ Key Features

-   Genuine Quicksilver OEM thermostat
-   Correct Mercury part number 855676
-   Used on selected Mercury / Mariner FourStroke outboards
-   Related to 855676003, 855676A1 and 825212 thermostat references
-   Helps regulate cooling water temperature and engine warm-up

## 🚤 Compatibility

### Commonly used on

-   Mercury / Mariner FourStroke outboard thermostat applications

### Typically suits

-   Engine models:
-   Mercury / Mariner 8HP FourStroke applications where 855676 is specified
-   Mercury / Mariner 9.9HP FourStroke applications where 855676 is specified
-   Mercury / Mariner 13.5HP FourStroke International applications where 855676 is specified
-   Mercury / Mariner 15HP FourStroke applications where 855676 is specified
-   Mercury / Mariner 25HP FourStroke applications where 855676 is specified
-   Mercury / Mariner 30HP FourStroke - USA serial 0G760300 to 1B226999
-   Mercury / Mariner 30HP FourStroke - Belgium serial 0P017000 to 0P400999
-   Mercury / Mariner 40HP FourStroke - USA serial 0G231123 and up
-   Mercury / Mariner 40HP FourStroke - Belgium serial 0P017000 and up
-   Mercury / Mariner 45HP FourStroke applications where 855676 is specified
-   Mercury / Mariner 50HP FourStroke - USA serial 0G231123 to 0T178499
-   Mercury / Mariner 75HP and 90HP FourStroke applications where 855676 thermostat family is specified
-   HP Range: 8HP - 90HP FourStroke where specified
-   Engine Type: Mercury / Mariner FourStroke outboard
-   Temperature Rating: commonly 60°C / 140°F thermostat family

## 🔌 Function

The thermostat controls cooling water flow through the engine so the outboard reaches and maintains correct operating temperature.

## ⚠️ Common Signs of Failure

-   Engine overheating
-   Engine running too cold
-   Slow warm-up
-   Temperature alarm
-   Thermostat corrosion, debris or sticking

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   855676003 related later thermostat reference
-   855676A1 related thermostat kit reference
-   825212001 related thermostat reference
-   825212T02 related service reference
-   855676 earlier OEM thermostat reference

### OEM / Related Numbers

-   855676
-   855676003
-   855676A1
-   825212
-   825212001
-   825212T02

### Aftermarket / Verified Equivalents

-   Sierra: 18-3642
-   Sierra: 18-3541
-   Recmar: REC825212T02

## 📦 Condition

-   Genuine Quicksilver part
-   Brand new
-   Supplied in original or equivalent packaging

## Details

- **Price:** 146.05 AUD
- **Vendor:** Quicksilver
- **Type:** Cooling System
- **Tags:** Quicksilver Marine Parts | Oils, Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 146.05 AUD | In stock |

## Images

- 855676 Mercury MerCruiser Thermostat | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/855676-mercury-mercruiser-thermostat-genuine-quicksilver-oem-part)
> Updated: 2026-09-06