Faria Chesapeake White SS 4" Tachometer - 4000 RPM (Diesel)(Mechanical Takeoff & Var Ratio Alt)

The Faria Chesapeake White SS 4" Tachometer – 4000 RPM (Diesel) with mechanical takeoff and variable ratio alternator is a precision marine engine monitoring instrument designed for diesel-powered vessels requiring accurate real-time RPM feedback. Built by Faria Beede Instruments, a trusted leader in marine gauges, this tachometer serves professional captains, commercial operators, and serious recreational boaters who depend on reliable engine diagnostics. The 4-inch dial format provides excellent visibility from the helm while the stainless steel construction ensures corrosion resistance in harsh saltwater and freshwater environments.

This mechanical takeoff tachometer operates independently of electrical power for the sensing mechanism, utilizing direct shaft input to deliver consistent, drift-free RPM readings up to 4000 RPM—the optimal range for most diesel marine engines. The variable ratio alternator feature allows the gauge to compensate for different alternator pulley configurations, ensuring accuracy across diverse engine setups without requiring electronic recalibration. The white dial face with black numerals and markings delivers superior contrast and readability in varying lighting conditions, critical for safe vessel operation during dawn, dusk, and night runs. Compact dimensions of 5 x 5 x 6 inches allow flexible panel mounting in tight helm spaces.

Diesel engine operators benefit most from this gauge's mechanical reliability and absence of electronic drift over extended service intervals. Installation requires direct mechanical connection to the engine's crankshaft via a flexible cable assembly (sold separately), making it ideal for retrofit applications on older vessels and new builds where redundant, non-electronic engine monitoring is essential. Compatible with standard marine instrument panels, this tachometer pairs seamlessly with other Chesapeake series gauges for a cohesive helm display. For commercial fishing, cargo, and passenger vessels, as well as private diesel cruisers, this instrument provides the dependable engine monitoring needed for safe, efficient operation in demanding marine environments.