833072003 Mercury MerCruiser Thermostat | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver 143°F Thermostat - Part Number: 833072003

A genuine Quicksilver 143°F thermostat used on selected Mercury and Mariner OptiMax / DFI outboards. This thermostat regulates cooling water temperature in the engine cooling system and is commonly used on 2.5L DFI 135HP, 150HP and 175HP applications.

⚙️ Key Features

• Genuine Quicksilver OEM thermostat

• Correct Mercury part number 833072003

• 143°F / 62°C thermostat

• Used on selected Mercury / Mariner OptiMax and DFI engines

• Direct replacement for specified 2.5L DFI cooling system applications

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 833072003 current OEM thermostat reference

• 833072 related OEM thermostat reference

• 833072002 / 833072004 related thermostat references

OEM / Related Numbers:

• 833072003

• 833072

• 833072002

• 833072004

• 27-62386001

• 62981

• 66850

• 75692

• 75692B

• 814554001

• 814554T01

Aftermarket / Verified Equivalents:

• Sierra: 18-3536

• Sierra: 18-3537

🚤 Compatibility

Commonly used on:

• Mercury / Mariner OptiMax / DFI cooling system thermostat applications

Typically suits:

• Engine models:

• Mercury / Mariner V135 DFI 2.5L - 1998 and newer, serial 0G590000 and up

• Mercury / Mariner V150 DFI 2.5L - 1998 and newer, serial 0G590000 and up

• Mercury / Mariner V175 DFI 2.5L - 2001 and newer, serial 0T178500 and up

• Mercury / Mariner OptiMax 135HP applications where 833072003 is specified

• Mercury / Mariner OptiMax 150HP applications where 833072003 is specified

• Mercury / Mariner OptiMax 175HP applications where 833072003 is specified

• Mercury / Mariner OptiMax 75HP, 90HP, 115HP, 135HP, 150HP and 175HP cooling applications where the 143°F thermostat family is specified

• HP Range: commonly 135HP - 175HP 2.5L DFI, with broader OptiMax thermostat-family applications where specified

• Engine Type: Mercury / Mariner OptiMax / DFI outboard

• Temperature Rating: 143°F / 62°C

• System Type: Cooling system thermostat

🔌 Function

The thermostat regulates cooling water flow so the engine reaches and maintains correct operating temperature.

Common signs of failure:

• Engine overheating

• Engine running too cold

• Temperature alarm at idle or under load

• Thermostat stuck open or closed

• Corrosion, scale or debris around the thermostat seat

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging