Smart white and red graphics on a black dial background add a sharp, classic style to any dash. These very low profile bezels follow the curve of the lens to eliminate water trapping. Scratch-resistant domed glass lenses shed water. Through-dial and perimeter lighting provides excellent readability at night. For outboard and 4-stroke engines. Mariner 30 and 40 HP (2-cylinder) engines require a module (Mercury P/N 17461A2). Sierra Part #58255P.• Dial Range: 0-7000 RPM• Sender Code: O/B ALT./COIL• Voltage: 12V DC• Current Draw: 0.10 - 0.15 A• Operating Temperature: -40C to +70C• Ingress Protection: IP65• Bezel O.D.: 3.78"• Housing O.D.: 3.39"• Hole Size: 3.43" Through-dial and perimeter lighting | Amega 3" Tachometer in Red