Howdy,
Check out the sticky at the top of the Generator Forum
MEP-802A MEP-803A Filters and Parts
2nd post has quick links
3rd post has the manuals you need. At least on the computer. Always nice to have the manuals still in the plastic.
Yes, I would say your unit has 14 original hours on it.
IMHO
long drain the oil, replace all filters, long drain the fuel tank, replace all filters
add john deere break-in plus oil, new filters
replace all fuel filters, careful on the cup filter, make sure its in the little track with gasket all the way around.
You might have trouble getting the fuel/water filter off. It seems King Kong put it on dry.
replace all fuel return lines
Charge the RedTop batteries with a good AGM charger. They will come back to life.
Double check the Quad Winding fuse is in place.
Fresh diesel, turn to prime and run... and wait, it takes a while to fill up all the new fuel filters... wait some more, the unit are self priming to a degree, it will fill all the filters and then return back to the fuel tank.
Have all your equipment ready for starting.
set what voltage you want (behind control panel, 120/240 single phase) ,--only when not running
Have a multimeter ready to check the outlet, and lugs. (convenience outlets are 10amps only) if you trip it, the reset button is right inside the front control panel.
Look at keeping a good load o the unit for at least the first 100 hours with the break-in oil.
After that, a good 15w-40 diesel oil of your choosing.
good luck.