Mercury – Quicksilver 160°F Thermostat Kit | For MerCruiser Engines | 807252Q3

Overview

A reliable thermostat is the key to keeping your engine running at the right temperature every time you hit the water. The Mercury Marine 807252Q3 Quicksilver Thermostat Kit is designed for 1982 and older V8 MerCruiser sterndrive and inboard engines made by Ford or General Motors, as well as 1996 and older high-performance models. This 160°F thermostat helps your engine reach and maintain its optimal operating temperature, improving fuel efficiency and performance while preventing overheating.

Key Features

• Purpose: Regulates engine temperature for efficient performance and protection.
• Temperature Rating: Opens at 160°F, maintaining proper operating heat levels.
• Compatibility: Fits 1982 and older V8 MerCruiser engines from Ford and GM, and 1996 and older high-performance models.
• Complete Kit: Includes thermostat, flat gasket, and rubber gasket — everything needed for replacement.
• Ease of Use: Straightforward installation with basic tools; designed for direct OEM fit.

Engine & Boat Compatibility

• V8 MerCruiser sterndrive and inboard engines (1982 and older) by Ford or General Motors
• High-performance MerCruiser engines (1996 and older) by Ford or GM

Performance & Real-World Benefits

The 807252Q3 thermostat kit keeps your engine running in its ideal temperature zone — warm enough to burn fuel efficiently but cool enough to prevent damage. A worn thermostat can stick open or closed, leading to poor fuel economy, rough idle, or overheating. This OEM replacement restores proper cooling balance, ensuring smoother operation and longer engine life.

Each component in this kit is made from high-quality materials built to handle the temperature swings and saltwater exposure of marine use. Once installed, it delivers consistent temperature control and peace of mind every time you fire up your MerCruiser.

Why Choose Mercury OEM

The Quicksilver 807252Q3 is a genuine Mercury Marine part, designed to meet factory specifications for flow, pressure, and temperature regulation. Aftermarket thermostats may look similar but often open at incorrect temperatures or don’t seal properly, leading to inconsistent cooling.

Mercury OEM components are tested under real boating conditions to ensure accuracy, reliability, and long-term performance — so you can focus on enjoying the water instead of worrying about your engine’s temperature.

FAQ

Q1: What engines does this thermostat fit?
It’s made for 1982 and older V8 MerCruiser engines from Ford and GM, and 1996 and older high-performance versions.

Q2: What temperature does it open at?
This thermostat is rated to open at 160°F, maintaining proper running temperature.

Q3: What’s included in the kit?
The kit includes the thermostat, a flat gasket, and a rubber gasket for installation.

Q4: How often should it be replaced?
Check during annual maintenance — replace it if it sticks, leaks, or shows corrosion.

Q5: Why OEM instead of aftermarket?
Mercury OEM thermostats are precisely calibrated and tested for marine conditions, ensuring correct operation and dependable cooling.