Mercury – Coolant Temperature Gauge | Dual Scale | White Face | 2-1/8" (52 mm) | 79-8M0052863Mercury Coolant Temperature Gauge Dual Scale White Face 2 1 8" (52 mm) 79 8M0052863 Overview The Mercury Coolant Temperature Gauge (79 8M0052863) gives you an easy, accurate way to monitor engine temperature at a glance. It features a dual scale display that reads in both Fahrenheit and Celsius, making it easy to reference no matter how you prefer your measurements. The white face, black numerals, and glass lens give it a clean, classic look that