Mercury – Quicksilver 833072004 Thermostat | Mercury 1.5L 3-Cylinder 75–115HP & Pro XS Outboards | 833072004

Overview

Your outboard performs best when it runs at the right temperature. The Quicksilver 833072004 Thermostat is designed for Mercury 1.5L 3-cylinder 75–115HP and Pro XS outboards, keeping your motor running at a consistent 143°F for maximum power, fuel efficiency, and reliability.

This OEM thermostat helps your engine warm up quickly and maintain its ideal operating temperature — preventing overheating and ensuring clean combustion. It’s a simple part that protects your outboard’s heart and keeps it running strong season after season.

Key Features

• Purpose: Regulates engine temperature to prevent overheating and ensure efficient fuel burn.
• Material: Made from corrosion-resistant brass and stainless steel, built for long life in marine conditions.
• Performance: Opens at 143°F, maintaining the precise temperature Mercury designed for optimal performance.
• Design: Factory-spec replacement thermostat that fits perfectly in Mercury 1.5L 3-cylinder 75–115HP and Pro XS outboards.
• Ease of Use / Install: Direct replacement that installs easily with standard tools — no adjustments required.

Engine & Boat Compatibility

• Mercury 1.5L 3-cylinder outboards:
• 75HP (0T980000–2B112577)
• 80HP (1B586067–2B111840)
• 90HP (0T801000–1B974258)
• 115HP (0T801000–2B018763)
• 125HP (1B736885–2B112787)
• 115HP Pro XS (1B751825–2B123429)

Performance & Real-World Benefits

The 833072004 thermostat ensures your outboard hits its target temperature quickly and stays there. A thermostat stuck open can cause the engine to run too cool and waste fuel, while one that won’t open can lead to overheating.

By replacing a worn or sticky thermostat with this OEM part, you’ll get faster warm-ups, stable running temps, and smoother performance at every speed. It’s simple maintenance that can save you from major engine trouble later.

Why Choose OEM

Mercury’s thermostats are built for the marine environment — calibrated precisely and tested to resist corrosion, salt buildup, and vibration. Aftermarket versions often use cheaper materials or inaccurate temperature ratings.

A genuine Quicksilver thermostat ensures perfect fit, proper opening temperature, and long-term reliability in all water conditions.

FAQ

Q1: What engines fit the Quicksilver 833072004 thermostat?
A: It fits Mercury 1.5L 3-cylinder 75–115HP and Pro XS outboards, covering several model years and serial ranges.

Q2: What temperature does it open at?
A: It opens at 143°F (62°C).

Q3: What’s included?
A: One OEM thermostat — gasket not included.

Q4: Is it easy to install?
A: Yes. Remove the old thermostat and drop this one in with basic tools.

Q5: Why OEM instead of aftermarket?
A: OEM thermostats are precisely calibrated and built to withstand marine use — aftermarket ones often aren’t.