Sierra’s 18-1989K Thermostat Service Kit is designed for use with 18-1989 Thermostat Housing. The kit contains Sierra’s 18-2917 Thermostat Housing Gasket, 18-2554 Thermostat Cover Gasket, and 18-2844 Thermostat Cover Gasket. Each Sierra product meets or exceeds the original equipment part it replaces.
Designed for use with 18-1989 Thermostat Housing
Contains Sierra’s 18-2917 Thermostat Housing Gasket, 18-2554 Thermostat Cover Gasket, and 18-2844 Thermostat Cover Gasket
Use in Mercruiser and OMC applications
Each Sierra product meets or exceeds the original equipment part it replaces
