I need a repair manual for a Honda ES6500 generator, can you tell me were to find it.

Question edited to add the make (what it is).
When you have the make, you can find the Honda ES6500 Generator Category.

https://www.google.com/search?q=honda+es6500+remove+fuel+tank

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What happens when you trurn off "auto-throttle"<?>.

Sounds like a weak spring on the governor

Hello Ricky, I would check the carburetor needle valve and seat along with the carburetor float. You could get lucky and just need to clean the crud out of the carburetor float bowl.

Depending on generator the error code is a wrong set governor, or a GFI on the electric side of unit. Push the reset button on the GFI an that should clear it. If not you will need a dealer.

If you run 12volts to the carb, will it run? I assume since it has no power at carb as you stated, that it has a fuel shut off at carb and will need voltage to activate magnet.

Remove ground wire from battery post. Make sure unit is off too. Remove start wire and cable from starter and both bolts. Reinstall in reverse order.

If the low oil switch fails, you have to jump the switch for the engine to operate. I have a compressor with that problem. Then either you watch the oil level carefully or install a new switch, which, in my case, requires disassembly of the crankcase.

Gary

Your charging regulator has failed. The reverse voltage caused one or more diodes to fail shorted, and this short is blowing the fuse.

lp

Hi there .
In my opinion you should remove the starter and check the starter first . After you remove the starter get a good 12v battery and 2 wires and test the starter . Make sure to not invert polarity . After you touch the wires on the contactor (small solenoid on the side) see if the overrunnig (part with gears) comes out easy and with no obstruction . If the overrunning does not come out you could have a bad contactor (part # 31204-ZA0-003) or a bad starter (part # 31200-ZA0-701) .
Hope this help