This unbranded 115702 mechanical tachometer with an integrated hour meter is a reliable replacement part for various agricultural tractors. It is compatible with Massey Ferguson 100 series models including 135, 165, 175, and 185, as well as Ford 2000, 3000, and 4000 series tractors. Designed to provide accurate engine RPM readings and track operational hours, this instrument features an 85mm diameter and a standard cable connection for straightforward installation and dependable performance in demanding farm environments.