# 825212A1 Mercury MerCruiser Thermostat Kit | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver 120°F Thermostat Kit - Part Number: 825212A1

  

A genuine Quicksilver thermostat kit for selected Mercury and Mariner FourStroke outboards. This kit includes the thermostat and shaped gasket used to regulate cooling water temperature in the cylinder head cooling circuit.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM thermostat kit

• Correct Mercury part number 825212A1

• 120°F thermostat kit

• Includes thermostat and custom formed gasket

• Used on selected 30HP, 40HP and 50HP FourStroke outboards

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 825212A1 current OEM thermostat kit reference

• 825212001 related OEM thermostat reference

• 855676A1 related thermostat kit reference

  

OEM / Related Numbers:

  

• 825212A1

• 825212001

• 825212

• 855676A1

• 855676003

• 855676

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-3642

• Recmar: REC825212T02

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury / Mariner FourStroke cooling system thermostat applications

  

Typically suits:

  

• Engine models:

• Mercury / Mariner 30HP FourStroke - USA 1999-2005, serial 0G760300 to 1B226999

• Mercury / Mariner 30HP FourStroke - Belgium 1999-2005, serial 0P017000 to 0P400999

• Mercury / Mariner 40HP FourStroke - USA 1998-2018, serial 0G231123 and up

• Mercury / Mariner 40HP FourStroke - Belgium 1999-2018, serial 0P017000 and up

• Mercury / Mariner 40HP 3-cylinder FourStroke - serial 1C049739 and up where 825212A1 is specified

• Mercury / Mariner 50HP FourStroke - USA 1995-2000, serial 0G231123 to 0T178499

• Mercury / Mariner 50HP FourStroke applications excluding Belgium serial-prefix applications where a different thermostat is specified

  

• HP Range: 30HP - 50HP

• Engine Type: Mercury / Mariner FourStroke outboard

• Temperature Rating: 120°F

• System Type: Cooling system thermostat kit

  

🔌 Function

  

The thermostat regulates engine operating temperature by controlling cooling water flow through the engine.

  

Common signs of failure:

  

• Engine running too cold

• Engine overheating

• Thermostat stuck open or closed

• Poor idle quality from incorrect operating temperature

• Corrosion or debris around thermostat housing

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 82.4 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 82.40 AUD | In stock |

## Images

- 825212A1 Mercury MerCruiser Thermostat Kit | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](www.sawleysautoandmarine.com.au/products/825212a1-mercury-mercruiser-thermostat-kit-genuine-quicksilver-oem-part)
> Updated: 2026-05-17