Can you have the numbers preset for the current hours?
Per the manufacturer, this Hobbs Meter (part number 15000) cannot be preset.
Does this Hobbs meter work off of the oil pressure switch or does it start operating as soon as the battery master is turned on?
Per the manual in the box you can wire to the ignition switch or a pressure switch to activate.
Can we connect the Honeywell Hobbs meter to the oil pressure switch on the engine? Does this work on pressure variation?
The Honeywell hobbs hour meter can connect to the ignition switch or a pressure switch. If connected to a pressure switch, once there is a rise in oil pressure, the hobbs will track time.
Does this hobbs come with wiring, terminals, screws etc?
Yes, the Honeywell hobbs meter (15000) comes with mounting hardware and 18" wire leads.
What is the current drawn?
The Honeywell hobbs meter (15000) draws 75 milliamps.