---
product_id: 302082377
title: "Quicksilver 8M0109441 Replacement Thermostat for MerCruiser Engines"
brand: "quicksilver"
price: "$23.61"
currency: USD
in_stock: true
reviews_count: 5
category: "Quicksilver"
url: https://www.desertcart.us/products/302082377-quicksilver-8m0109441-replacement-thermostat-for-mercruiser-engines
store_origin: US
region: United States of America
---

# Easy DIY replacement OEM spec engineered 160°F precision temp control Quicksilver 8M0109441 Replacement Thermostat for MerCruiser Engines

**Brand:** quicksilver
**Price:** $23.61
**Availability:** ✅ In Stock

## Summary

> 🌊 Keep your MerCruiser cool and cruising with precision-engineered performance!

## Quick Answers

- **What is this?** Quicksilver 8M0109441 Replacement Thermostat for MerCruiser Engines by quicksilver
- **How much does it cost?** $23.61 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/302082377-quicksilver-8m0109441-replacement-thermostat-for-mercruiser-engines)

## Best For

- quicksilver enthusiasts

## Why This Product

- Trusted quicksilver brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **OEM-Grade Quality:** Built to Mercury Marine specs ensuring reliable, long-lasting marine engine protection.
- • **Trusted Marine Legacy:** Backed by Quicksilver’s 65+ years of marine industry expertise and rigorous testing.
- • **Engineered for MerCruiser:** Specifically designed for MerCruiser engines to prevent overheating and maximize uptime.
- • **Precision 160°F Thermostat:** Maintains optimal engine temperature for peak performance and fuel efficiency.
- • **Quick & Simple Installation:** Replace your thermostat in under 15 minutes with common tools—no mechanic needed.

## Overview

The Quicksilver 8M0109441 Replacement Thermostat is a 160°F temperature-controlled component designed specifically for MerCruiser engines. Manufactured to meet Mercury Marine OEM standards, it ensures optimal engine cooling for peak performance and efficiency. Easy to install with common tools, this thermostat is backed by Quicksilver’s 65+ years of marine industry expertise, providing reliable, long-lasting protection against engine overheating.

## Description

Thermostat 8M0109441 is for MerCruiser engines made by General Motors with standard cooling systems requiring the use of the 160 degree (F) thermostat. The Quicksilver brand is the leader in delivering uncompromising engine oils, parts and accessories to the marine industry for over 65 years. Quicksilver is the premier supplier of Mercury Marine original Equipment replacement engine parts, oils, and accessories, but also works to serve all original Equipment brands in the marine and powersports industries. It has earned a loyal following by providing the highest quality products that are tested through some of the most rigorous environments and testing procedures. No aftermarket company comes close to the level of research and design as Quicksilver; buying Quicksilver is buying performance, protection and peace of mind.

Review: le premier n'a pas fonctionné la température été très élevé....j'ai commandé un deuxième et celui ci est parfait la température ce maintien entre 170 et 185 degrés.
Review: Generally, it's a good idea to replace these thermostats every few seasons, depending on how often you're on the water. I never had issues with the thermostat in my Mercruiser 3.0 Alpha One (2008 Bayliner), but the thermostat was definitely the original, had never been replaced. Before installing, boil water and drop the new thermostat in to make sure it's opening properly. Biggest problem with thermostats is they get stuck open, which won't overheat your engine, but won't allow it to run optimally. If they get stuck closed, the engine will overheat. Quicksilver parts tend to be well made and more reliable than the no-name brands out there, but their parts are somewhat more costly. Either way, for $30, and about 10-15 minutes to install, it's worth replacing. The biggest hassle with the installation is the plastic sleeve within the thermostat housing. It's tough to remove. Easiest way to get it out is to flat out break it with a flathead screwdriver. I recommend buying a replacement plastic sleeve and the proper gaskets prior to installing. There's a small ringed gasket that goes underneath the thermostat as well. The plastic sleeve will not likely sit flush to the housing even after tapping it in with a rubber mallet or wooden block, though once the bolts are ratcheted in it should end up flush with the top of the housing. After installing, throw the muffs on your lower unit and run the engine to ensure it doesn't overheat. If the thermostat is working properly, your engine temp should hover around 175F, give or take a few degrees. The Quicksilver thermostat worked as it should, and should hold up for several boating seasons.

## Features

- 160°F thermostat
- Use only the temperature thermostat listed in your owner's manual or service manual
- Proper engine cooling temperature ensures peak performance and highest efficiency.
- Easy to replace with common tools
- See your owner's manual for removal of non-functioning thermostat and replacement of new thermostat
- Produced to meet Mercury Marine original equipment manufacturer specifications to maximize the performance of your Mercury and Mariner outboard or MerCruiser sterndrive

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001HBSY4A |
| Batteries Included? | No |
| Best Sellers Rank | #229,856 in Automotive ( See Top 100 in Automotive ) #445 in Car Engine Thermostats |
| Brand | Quicksilver |
| Color | Unspecified |
| Customer Reviews | 4.6 4.6 out of 5 stars (137) |
| Date First Available | 1 January 2024 |
| Department | Boat Engine Parts and Accessories |
| Display Type | LCD" or "LED |
| Included Components | 1 160 degree thermostat |
| Is Discontinued By Manufacturer | No |
| Item model number | 8M0109441 |
| Manufacturer | Quicksilver |
| Material Type | Various Materials |
| Number of Items | 1 |
| Power Source | Battery Powered |
| Product Dimensions | 5.08 x 5.08 x 3.81 cm; 54.43 g |
| Size | Unspecified |
| Usage | MerCruiser engines, temperature control |
| Weight | 1 Pounds |

## Images

![Quicksilver 8M0109441 Replacement Thermostat for MerCruiser Engines - Image 1](https://m.media-amazon.com/images/I/81O6syidZPL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***E on 20 June 2023*

le premier n'a pas fonctionné la température été très élevé....j'ai commandé un deuxième et celui ci est parfait la température ce maintien entre 170 et 185 degrés.

### ⭐⭐⭐⭐⭐ Review
*by C***Y on 10 April 2024*

Generally, it's a good idea to replace these thermostats every few seasons, depending on how often you're on the water. I never had issues with the thermostat in my Mercruiser 3.0 Alpha One (2008 Bayliner), but the thermostat was definitely the original, had never been replaced. Before installing, boil water and drop the new thermostat in to make sure it's opening properly. Biggest problem with thermostats is they get stuck open, which won't overheat your engine, but won't allow it to run optimally. If they get stuck closed, the engine will overheat. Quicksilver parts tend to be well made and more reliable than the no-name brands out there, but their parts are somewhat more costly. Either way, for $30, and about 10-15 minutes to install, it's worth replacing. The biggest hassle with the installation is the plastic sleeve within the thermostat housing. It's tough to remove. Easiest way to get it out is to flat out break it with a flathead screwdriver. I recommend buying a replacement plastic sleeve and the proper gaskets prior to installing. There's a small ringed gasket that goes underneath the thermostat as well. The plastic sleeve will not likely sit flush to the housing even after tapping it in with a rubber mallet or wooden block, though once the bolts are ratcheted in it should end up flush with the top of the housing. After installing, throw the muffs on your lower unit and run the engine to ensure it doesn't overheat. If the thermostat is working properly, your engine temp should hover around 175F, give or take a few degrees. The Quicksilver thermostat worked as it should, and should hold up for several boating seasons.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 26 December 2025*

Exact Mercruiser replacement thermostat

## Frequently Bought Together

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-01-24*