Quicksilver 8M0090819 Thermostat Assy - MW
Mercury - Mercruiser 8M0090819 Thermostat Assy
The Quicksilver Thermostat Assembly 8M0090819 is designed for Mercury 75–115HP 2.1L EFI FourStroke outboards. This 120°F thermostat helps maintain proper engine operating temperature for reliable performance and fuel efficiency. Produced to Mercury Marine OEM specifications, it ensures precise fit, dependable function, and long-lasting durability. The thermostat is easy to replace using common tools, but always follow your owner’s or service manual for correct removal of a non-functioning thermostat and installation of the new unit. For best performance and protection, use only the thermostat temperature specified in your manual.
Genuine OEM Mercury-Mercruiser part.
- Fits Mercury 75–115HP 2.1L EFI FourStroke outboards
- 120°F thermostat for correct engine temperature control
- Made to Mercury Marine OEM specifications
- Easy installation with common tools
- Use only the thermostat temperature recommended in your owner’s manual
- Follow service manual instructions for safe removal and replacement
WARNING: Cancer and Reproductive Harm - P65Warnings.ca.gov


