Sierra 18-5897 Temperature Sender Sierra Temperature Sender Thread Size: 3/8"-18 NPT, Terminal Type: 10-32 Stud, Range: 240 DS Sierra part number: 18-5897 Interchangeable with the following: Mallory 9-42400, Medallion A-2618-3, Mercruiser 36525, 97257, 22-811091, 97257A1, 806490, 806490T, OMC 980613, 3853787, Stewart Warner 352BC-D, Veethree Seastar 52320S018, Volvo Penta 3853787