48952 Water Temperature Sender Switch for Mercruiser 3.0L 4.3L 5.0L 5.7L 7.4L | JLM Marine family-yamaha-f20lwb Disassembly: On a clean workbench

Disassembly: On a clean workbench

Note the rotational direction of the existing impeller vanes before sliding the old impeller off the driveshaft

inspect and replace more often to prevent cooling system failure

Install New Impeller: Slide the new impeller onto the shaft while turning the driveshaft clockwise to bend the vanes in the correct direction

48952 Water Temperature Sender Switch for Mercruiser 3.0L 4.3L 5.0L 5.7L 7.4L | JLM Marine family-yamaha-f20lwb Disassembly: On a clean workbenchWater Temperature Sender Switch for Mercruiser 3. 0L 4. 3L 5. 0L 5. 7L 7. 4L This water temperature sender switch is designed for Mercruiser stern drive engines ranging from 3. 0L to 7. 4L. It provides critical temperature monitoring for your audio alarm system, ensuring you're alerted to overheating conditions before engine damage occurs. This aftermarket replacement directly replaces Mercruiser OEM part numbers 48952 and 806951, offering a reliable