Quicksilver 850055001 110° Thermostat Mercury 30-60 HP

Quicksilver 850055001 110° Thermostat Mercury 30-60 HP

Quicksilver 850055001 is a 110°F replacement thermostat for select Mercury and Mariner 30-60 HP 2-stroke outboards, including applicable Jet and BigFoot models. It supersedes earlier part number 850055.

Key Features

• 110°F thermostat
• Fits select Mercury and Mariner 30-60 HP 2-stroke outboards
• Includes applications with Jet and BigFoot gearcase configurations
• Direct replacement for superseded part number 850055
• Genuine Quicksilver marine replacement component

Verified Applications

• 40/50 HP Jet 30, 3-cylinder: serial 0G590000-0T408999
• 55/60 HP Jet 40/45, 3-cylinder: serial 0T178500-0T979999

Additional select Mercury and Mariner 30-60 HP 2-stroke applications are listed for this thermostat. Always verify fitment by engine serial number, parts diagram, owner’s manual, or service manual before ordering.

Product Details

• Thermostat temperature: 110°F
• Part number: 850055001
• Supersedes: 850055
• Country of origin: USA
• UPC: 745061421868

Why Replace the Thermostat?

A properly functioning thermostat helps the engine reach and maintain its intended operating temperature. Replacing a sticking or failed thermostat can help restore correct warm-up behavior and cooling-system performance.

FAQ

What temperature is this thermostat?

This is a 110°F thermostat.

Does this fit every Mercury 30-60 HP outboard?

No. Fitment varies by model and serial range. Verify your engine serial number before ordering.

What older part number does it replace?

850055001 supersedes 850055.