Feature: 1. PART NUMBERS: Tachometer assembly replace part numbers are 6Y5 83500 F1 00, 6Y5 8350F 00 00, 6Y5 8350F 01 00, 6Y5 8350F B0 00 for reference, making it a suitable addition to most dashboard configurations. 2. HIGH COMPATIBILITY: The multifunctional fuel management gauge is fit for 1996 and newer 40HP‑300HP 2 Stroke And F25‑F250 4 Stroke outboard engnies only. 3. COMPREHENSIVE FUEL USAGE READINGS: The meter provides readings for fuel consumption and fuel economy (with the use of a speedometer or GPS input readings), offering precise information for fuel efficiency management. 4. EARLY WARNING SYSTEM: The speedometer gauge includes a fuel pollution warning feature when a deluxe fuel water separator is in use, ensuring damage prevention and engine longevity. 5. ENGINE SYNCHRONIZATION: The tachometer assembly has an engine synchronization feature for twin engine applications, ensuring both engines function in harmony for optimal performance. Specification: Item Type: Tachometer AssemblyMaterial: ABSPart Number: 6Y5 83500 F1 00, 6Y5 8350F 00 00, 6Y5 8350F 01 00, 6Y5 8350F B0 00 Application: For 1996 And Newer 40HP-300HP 2-Stroke And F25-F250 4-Stroke Outboard Engnies Only . Package List: 1 x Tachometer Assembly1 x Wire Harness Note: 1. This list is only applicable to gauges. If you are installing a new engine or have not installed a fuel management gauge on your vessel, you will need to use the 6Y5‑83553‑F1‑00 fuel flow harness and at least one 6Y5‑85752‑02‑00 fuel flow sensor to complete the installation.2. Please double check the part number of your item, matching information is for reference only.