---
product_id: 10320742
title: "Sierra International 18-3569 Marine Thermostat Kit for Mercury/Mariner Outboard Motor"
brand: "sierra"
price: "1567724₫"
currency: VND
in_stock: true
reviews_count: 12
category: "Sierra"
url: https://www.desertcart.vn/products/10320742-sierra-international-18-3569-marine-thermostat-kit-for-mercury-mariner
store_origin: VN
region: Vietnam
---

# Complete kit with gasket & cover for seamless install Precision-fit for Mercury/Mariner 70-125 HP outboards Reliable 120°F temperature rating Sierra International 18-3569 Marine Thermostat Kit for Mercury/Mariner Outboard Motor

**Brand:** sierra
**Price:** 1567724₫
**Availability:** ✅ In Stock

## Summary

> 🌊 Keep your outboard cool and cruising with precision power!

## Quick Answers

- **What is this?** Sierra International 18-3569 Marine Thermostat Kit for Mercury/Mariner Outboard Motor by sierra
- **How much does it cost?** 1567724₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/10320742-sierra-international-18-3569-marine-thermostat-kit-for-mercury-mariner)

## Best For

- sierra enthusiasts

## Why This Product

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

## Key Features

- • **Proven Reliability:** Highly rated by users for perfect fit and consistent performance—don’t let your boat miss out.
- • **Durable & Adjustable:** Crafted from premium metal with adjustable thermostatic control to keep your motor running smooth.
- • **Trusted Compatibility:** Interchangeable with GLM 13124, Mallory 9-43155, and Mercury Marine 803061T1 for guaranteed fit.
- • **Plug-and-Play Installation:** Includes thermostat, gasket, and cover gasket for a hassle-free, OEM-quality replacement.
- • **Engineered for Peak Performance:** Fits Mercury/Mariner 70-125 HP 2-cycle outboards (1987+), ensuring optimal engine temperature control.

## Overview

The Sierra International 18-3569 Marine Thermostat Kit is a precision-engineered replacement thermostat designed for Mercury/Mariner 70-125 HP 2-cycle outboard motors from 1987 onward. Featuring a 120°F temperature rating and including all necessary gaskets, this durable metal kit ensures reliable engine temperature regulation and seamless installation. Compatible with multiple OEM parts, it delivers trusted performance and longevity for marine enthusiasts.

## Description

Sierra's 18-3569 Thermostat Kit fits various Mercury/Mariner 70-125 HP 2 cycle outboards (1987 and newer). The kit includes (1) 18-0182 Thermostat Gasket, (1) 18-0339 Thermostat Cover Gasket, and (1) 18-3549 Thermostat. It is interchangeable with GLM 13124, Mallory 9-43155, and Mercury Marine 803061T1. Each Sierra product meets or exceeds the original equipment part it replaces.

Review: Good part decent price - Fit and worked well
Review: Perfect fit - Fit perfect on 1996 mercury 115 2 stroke.

## Features

- Fits : Various Mercury/Mariner 70-125 hp 2 cycle outboards (1987 and newer)
- Temperature Rating: 120°F

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000N9NXLG |
| Backlight | No |
| Best Sellers Rank | #918,928 in Automotive ( See Top 100 in Automotive ) #1,951 in Automotive Replacement Engine Thermostats |
| Brand | Sierra |
| Color | White |
| Connectivity Protocol | Wi-Fi |
| Connectivity Technology | Wi-Fi |
| Control Method | Touch |
| Control Type | Touchpad Control |
| Controller Type | Touch |
| Customer Reviews | 4.6 4.6 out of 5 stars (152) |
| Date First Available | February 6, 2007 |
| Display Type | touchscreen |
| Exterior | Machined |
| Global Trade Identification Number | 00808282112899 |
| Included Components | Sierra 18-3569 Thermostat Kit |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.28 ounces |
| Item model number | 18-3569 |
| Lift Type | MOTOR |
| Manufacturer | Sierra |
| Manufacturer Part Number | 183569 |
| Material | Metal |
| Model Name | Sierra 18-3569 Thermostat Kit |
| Mounting Type | Bracket Mount |
| OEM Part Number | MERCURY MARINE 803061T1 |
| Power Source | Battery Powered |
| Product Dimensions | 5"D x 8.9"W x 5"H |
| Special Feature | Adjustable |
| Special Features | Adjustable |
| Specific Uses For Product | Marine Outboard Motor Control |
| Style | Classic |
| Temperature Control Type | Thermostatic |
| UPC | 808282112899 |

## Product Details

- **Brand:** Sierra
- **Controller Type:** Touch
- **Model Name:** Sierra 18-3569 Thermostat Kit
- **Product Dimensions:** 5"D x 8.9"W x 5"H
- **Special Feature:** Adjustable

## Images

![Sierra International 18-3569 Marine Thermostat Kit for Mercury/Mariner Outboard Motor - Image 1](https://m.media-amazon.com/images/I/41ZZX++BQvL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good part decent price
*by K***. on December 4, 2025*

Fit and worked well

### ⭐⭐⭐⭐⭐ Perfect fit
*by A***E on January 23, 2026*

Fit perfect on 1996 mercury 115 2 stroke.

### ⭐⭐⭐⭐⭐ Boat
*by A***. on December 17, 2024*

Worked well for what my husband needed it for fits just right

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**Shop now:** [https://www.desertcart.vn/products/10320742-sierra-international-18-3569-marine-thermostat-kit-for-mercury-mariner](https://www.desertcart.vn/products/10320742-sierra-international-18-3569-marine-thermostat-kit-for-mercury-mariner)

---

*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-18*