Mercruiser Style Lower Thermostat Housing | Sierra 18-1994
Thermostat housing includes copper tee, pipe plugs, sealing rings & other various hardware.
Mercruiser Style Lower Thermostat Housing | Sierra 18-1994
- Fits many different Mercruiser applications
- Used with Sierra 18-1977-1 upper thermostat housing
- For stainless steel version use Sierra 18-1989
- Replaces Mercury 8M0061381, 87290A4
- Replaces Mallory 9-42502
- Replaces Osco MC552-SB
