Water Temperature Sensor Mercruiser 330 340 7.4L 350 370 390 400 420 425 440 454
225 (Ford) 3385721 & UP 18-5897(2). 1x Temperature Sending Unit Sensor. Part Number: 18-5897. Model Serial # Part #. All products are quality checked. Otherwise deal is final. 350 (Magnum) A635178- B525981 18-5897.