Sierra 18-3551 Thermostat 140 Degrees GORUGS3 Port Type 1/4" Internal Thread

Port Type 1/4" Internal Thread

Port(s) PAR-MAX 4 Pump and Toilet Inlet 3/4" Hose Barb Outlet 1" Hose Barb

Takes seconds to put in place and seconds to remove and store when your boat is running

Replacement compressor fits all AFI 12 Volt Air Horns

Sierra 18-3551 Thermostat 140 Degrees GORUGS3 Port Type 1/4" Internal ThreadUsed on raw water cooled engines 142 degrees Replaces Mercruiser #59137. Used on Models: 175 1987 185 (2 BBL) 1985 to 1987 185 (4 BBL) 1983 to 1984 198 1977 200 1985 to 1986 205 1985 to 1987 215 1970 to 1972 225 1973 to 1974 228 1977 to 1984 230 1985 to 1995 233 1975 to 1976 250 1977 255 1973 to 1980 260 1978 to 1987 280 1975 to 1976 300 1985 to 1986 320 1988 to 1989 325 1968 to 1974 330 1977 to 19873 340 1981 to 1987 350 1986 to 1987 350 1974 to 1976