This high-quality thermostat housing is designed for use with MerCruiser 7.4l engines. It is an essential part of the cooling system, ensuring that the engine stays at the correct temperature for optimal performance. The housing is specifically designed for use with water necks and is compatible with part numbers 47440 and 87110. Crafted from durable materials, this thermostat housing is built to last and withstand the rigors of all types of marine environments. It is easy to install and use, providing reliable and efficient performance for your MerCruiser engine. Whether you're a professional mechanic or a recreational boater, this thermostat housing is a must-have accessory for your boat.