Hardline Products USA EDT9 Inductive Hour Meter & Digital Tachometer - Replacement for STIHL 5910 850 1100 - Waterproof RPM Gauge for Chainsaws, Generators, & 2/4 Stroke Small Engines – HR-8061-EDT9

Take the Guesswork Out of Engine Tuning and Maintenance Whether you are a professional arborist tuning a chainsaw in the field or a homeowner maintaining a portable generator, accuracy matters. The Hardline Products EDT9 Hour Meter & Tachometer is the industry standard for monitoring small engine performance. Designed as a direct replacement for the STIHL 5910 850 1100, this meter goes beyond simple hour tracking. It provides real-time RPM feedback, allowing you to fine-tune carburetors for peak power and efficiency while preventing engine damage from over-revving. Why Choose the EDT9? Precision Tuning: See your engine's exact RPMs (up to 16,000) to adjust idle and wide-open throttle settings with confidence. Total Maintenance Tracking: Keep a running total of engine hours to know exactly when to service filters, plugs, and oil. Set It and Forget It: With a 10-year sealed battery and IP68 waterproof epoxy construction, this unit is built to outlast the equipment it’s mounted on. Universal Compatibility Works on any gas engine up to 2 cylinders and 16,000 RPM. Equipment: Chainsaws, Motorcycles, ATVs, UTVs, Generators, Snowblowers, Lawn Mowers, Boats, and PWCs. Engines: 2-Stroke and 4-Stroke (Fuel Injected or Carbureted). Tech Specs: Resolution: 10 RPM / 0.1 Hours Cable Length: 48 inches (can be trimmed) Dimensions: 2 1/8″ x 1 1/2″ x 5/8″ Includes: Meter, Pick-up Wire, Spring Clip, Log Book, and Instructions.

• PROFESSIONAL GRADE STIHL REPLACEMENT: Designed as a direct, high-performance upgrade for the STIHL EDT9 (OEM Part # 5910-850-1100). Essential for precision carburetor tuning, this meter allows you to accurately monitor max RPMs and idle speeds on chainsaws, blowers, and trimmers. Universally compatible with Husqvarna, Echo, Ryobi, and other 1 & 2-cylinder gas engines (up to 16,000 RPM).
• DUAL FUNCTION RPM & HOUR TRACKING: Eliminates guesswork by displaying real-time RPMs while the engine is running and automatically switching to total accumulated runtime when the engine is off. Perfect for tracking maintenance intervals for oil changes, spark plugs, and valve adjustments. Includes a "Max RPM" recall function to review peak performance after use.
• WATERPROOF & VIBRATION RESISTANT: Built for harsh outdoor environments. The internal electronics are 100% encapsulated in solid-state epoxy, giving the unit an IP68 waterproof rating. It withstands heavy vibration, rain, and mud, ensuring reliability whether you are in the forest or the workshop.
• EASY PEEL & STICK INSTALLATION: No wiring harness, ground wire, or complex tools required. Installs in minutes with the included strong adhesive backing. The inductive pickup wire (48" length) simply wraps around your spark plug wire or attaches via the included alligator clip for instant readings.
• 10-YEAR BATTERY LIFE : Engineered, assembled, and tested in the USA with global and domestic parts. Features a sealed internal lithium battery rated for a decade of service life. No battery replacements are ever needed, offering a truly maintenance-free experience.