Quicksilver 805218T MCM/MIE EFI Coolant Temperature Sensor AssyEngine coolant temperature gauge sender 805218T is for use with MerCruiser sterndrive and inboard engines. See your owner's manual or service manual for specific applications and replacement instructions. Used for temperature gauge.Application: Fits MCM/MIE EFI models For use with MerCruiser EFI sterndrive and inboard engine applications; Always use Quicksilver instruments with Mercury and Mariner outboards and MerCruiser sterndrives and inboards; Produced to meet Mercury Marine original equipment manufacturer specifications to maximize the performance of your Mercury and Mariner outboard or MerCruiser sterndrive; Easy to install with common shop tools; Replaces: Mallory 9-42402; Redline RL7600; Sierra 18-7600;