Mercury – Quicksilver 160 Degree Thermostat | Engine Cooling System | Standard Marine Construction | 8M0109441

Overview

Every boater has that one moment when something as simple as temperature makes or breaks the day. Maybe it is the smooth pull onto plane when everything is running just right, or the quiet rumble as you idle along a shoreline without a hint of hesitation. That kind of confidence comes from an engine held at the perfect operating temperature. The Quicksilver 160 Degree Thermostat delivers that steady reassurance, letting you run with the calm certainty that your cooling system is doing exactly what it should — no surprises, no stress, just dependable performance every time you turn the key.

Key Features

• Maintains a consistent 160 degrees Fahrenheit operating temperature
• Designed for MerCruiser engines built by General Motors with standard cooling systems
• Precision-calibrated thermostat for accurate cooling control
• Built to Mercury Marine original equipment manufacturer standards
• Simple replacement with common hand tools

Engine & Boat Compatibility

• Fits MerCruiser engines produced by General Motors that specify a 160 degree thermostat
• Works with many sterndrive setups using standard cooling systems
• Common on runabouts, cruisers, sport boats, pontoons, wake boats, and compact cabin boats
• Ideal for boaters seeking reliable engine temperature regulation for both recreational and working vessels

Performance & Practical Benefits

An engine’s temperature may seem like a small detail, but on the water it affects everything — throttle response, fuel economy, longevity, and how smooth your boat feels under your hands. When this thermostat is installed, your engine settles into that steady, predictable rhythm Mercury owners know well. The cooling temperature stays tight and stable, allowing your engine to operate cleanly without running too cool or too hot.

You will notice the difference in daily use: quicker warm-up, smoother cruising, and consistent performance when shifting from idle to acceleration. Eliminating temperature swings reduces internal stress on the engine, which helps protect major components over the long haul. The design is straightforward and durable, built to withstand the constant flow of water, pressure changes, and heat cycles that come with marine use. Maintenance is simple, too — swap out the old thermostat, tighten everything down, and you are back on the water with confidence restored.

Why Buy OEM

When it comes to engine temperature, close is not good enough. Using a genuine Mercury Marine part ensures the thermostat opens and closes at exactly the right point every time. With part number 8M0109441, you are getting something engineered specifically for your MerCruiser setup, not a generic thermostat aimed at “most” marine engines. The precision is better, the reliability is proven, and the long-term cost is lower because you are avoiding premature wear and inconsistent performance. If you want your boat to run the way Mercury designed it, OEM is the only choice that truly makes sense.

FAQ

Q1: Which engines does the Quicksilver 160 Degree Thermostat fit?

It fits MerCruiser engines built by General Motors that require a 160 degree thermostat.

Q2: What makes it better than aftermarket thermostats?

The calibration is exact, and the quality meets Mercury Marine standards for durability and dependable temperature control.

Q3: How do I confirm it is the right thermostat?

Check your manual and match the specification to Mercury Marine part number 8M0109441.

Q4: Can it be used in both fresh and saltwater environments?

Absolutely — it is designed for long-lasting performance in either environment.

Q5: Is installation straightforward?

Most boaters with basic tools can replace a thermostat easily by following their service manual.