THERMOSTAT HOUSING

MerCruiser thermostat housing for seawater-cooled 2.5- and 3.0-liter inline engines

Model types:

Mercruiser 120 GM 153 I/L4 1964–1986 S/N: 1666601-0B531853

Mercruiser 140 GM 181 I/L4 1968–1986 S/N: 2508261-0B450800

Mercruiser 160 GM 250 I/L6 1967–1969 S/N: 2048022-2770031

Mercruiser 165 GM 250 I/L6 1970–1981 S/N: 2770032 & higher

Mercruiser 2.5 l GM 153 I/L4 1987–1989 S/N: 0B531854-0C856558

Mercruiser 200 GM 292 I/L6 1969 S/N: 2453769-2712072

Mercruiser 3.0 l GM 181 I/L4 1987–1994 and 1998 S/N: 0B450801-0F353099 and 0L010042-0L096999

Mercruiser 3.0 l GM 181 I/L4 1990–1997 Serial number: 0C856559-0K999999

Mercruiser 3.0 l GM 181 I/L4 Serial number: 0L097000 and higher