Used Mercury Mercruiser Quicksilver thermostat housing 90736A18. Casting number 87110. Please note the chip at the thermostat seat area. The gasket surfaces and hose connection surfaces have also been cleaned to show typical pitting at these areas as well. Neither of these affects this items use. Because of this damage however, this item is being sold as-is. Skippers Marine specializes in new old stock, recycled and those hard to find marine parts and accessories.  6-9703