Meter hobbs 12v elapsed Hour meter 12-24v built-in Wiring an hour meter
Wiring an Hour Meter - YouTube
Meter 24v Meter hour wiring Hobbs hour meter 12v wiring diagram
Wiring an Hour Meter - YouTube
Hour meter 12-24V built-in - AB Marine service
Hobbs Hour Meter 12v Wiring Diagram - Wiring Diagram and Schematic