# 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

  

🔄 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

  

🚤 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

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 146.05 AUD
- **Vendor:** Quicksilver
- **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](www.sawleysautoandmarine.com.au/products/855676-mercury-mercruiser-thermostat-genuine-quicksilver-oem-part)
> Updated: 2026-05-17