Mercury – Quicksilver Water Temperature Switch | Engine Monitoring Part | For Audio Warning Systems | 48952

Overview

When your engine starts running hot, every second counts. The Mercury Marine 48952 Quicksilver Water Temperature Switch is the part that sounds the alarm before heat does any damage. It’s made for MerCruiser sterndrives and inboard engines with built-in audio warning systems, turning on the buzzer when the temperature rises past safe limits. Built tough with marine-grade materials, it stands up to heat, vibration, and saltwater exposure. It’s a small part that gives you a big layer of protection out on the water.

Key Features

• Function: Activates the audio warning when the engine temperature gets too high.
• Design: Made to Mercury’s factory specifications for accurate readings and reliable response.
• Material: Built from heat- and corrosion-resistant components for long-term marine use.
• Performance: Reacts quickly to temperature spikes to help prevent serious engine damage.
• Durability: Handles years of heat cycling, moisture, and vibration without failing.
• Compatibility: Works with MerCruiser sterndrive and inboard engines that have audio warning systems.

Engine & Boat Compatibility

• MerCruiser sterndrives with audio warning systems
• MerCruiser inboard engines with audio warning systems

Performance & Real-World Benefits

The 48952 temperature switch acts as your engine’s safety net. If the cooling system fails or the temperature climbs too high, it instantly triggers your warning buzzer — letting you shut down before serious damage happens. It’s reliable, simple, and built to last.

You might not think about it often, but when this switch does its job, it can save your engine. It’s designed to handle the constant exposure to heat and water that comes with marine use while staying accurate year after year.

Why Choose Mercury OEM

The Quicksilver 48952 is an authentic Mercury Marine part, built specifically for your MerCruiser’s warning system. Aftermarket switches can trigger too late or not at all because they’re not properly calibrated for Mercury engines.

Mercury OEM switches are factory-tested for temperature accuracy and durability in harsh marine conditions. It’s the right fit and the right protection — exactly what your boat was built to use.

FAQ

Q1: What engines does this part fit?
It fits MerCruiser sterndrive and inboard engines that use factory audio warning systems.

Q2: What does it do?
It monitors water temperature and activates an alarm when the engine overheats.

Q3: Is installation difficult?
Not at all. It’s a direct-fit replacement that installs easily with basic hand tools.

Q4: Will it hold up in saltwater?
Yes — it’s designed with marine-grade materials that resist corrosion.

Q5: Why OEM instead of aftermarket?
Mercury OEM parts are tuned to exact temperature ranges and tested for reliability. Aftermarket versions aren’t as precise.