. Features white dial, black numerals, and black pointer with fire-orange tip. Scratch-resistant curved glass lenses with polished stainless steel, near flush bezels. U.S. and metric scales with ISO symbols. White perimeter and red thru-dial lighting. Sierra Part #65693P.• White dial, black numerals, black pointer with fire-orange tip• Scratch-resistant curved glass lenses with polished stainless steel, near-flush bezels• White perimeter and red thru-dial lighting• Dial Range: 0-7000 RPM• Tachometers (Electric): O/B & 4-Stroke Gas Engines• Sender Code: O/B ALT./COIL• Tachometer: Mariner 30 & 40 HP (2-cylinder) engines require a module (Mercury P/N 17461A2)• Current Draw: 0.10 - 0.15 A• Operating Temperature: -40C to +70C• Ingress Protection: IP65• Bezel O.D.: 3.74"• Housing O.D.: 3.39"• Hole Size: 3.43" Near-flush bezel Perimeter and thru-dial lighting | Lido 3" Tachometer in Red