Coleman Vantage 3500 generator: cannot rotate the engine a full turn. Seems to be bumping on the internal govenor. Internal oil level stop may be stuck in "Low" position?? Am removing the generator end so I can get to the crankcase. Have gotten to the rotor, and cannot get it off the shaft. Thru-bolt removed from rotor. I don't have a parts break-down. Generator is not rusty. What is the trick to getting rotor off the crankshaft? Pully puller bolted to rotor and pushing on backed-out thru-bolt? Thanks in advance.

SOURCE: generator will start and run easy, then just die.

Check for loose wiring connections, especially at the run or kill switch. Generators vibrate a lot so it could be as simple as something loose.

SOURCE: I have a Coleman Vantage 3500 motor runs no generator output

This sound like a loss of residual magnetism in the generator. The field will need to be "flashed".This is also known as re-exciting the field of the generator.
The Coleman manual gives these steps:
1Use a 6 Volt lantern batters (dry cell) or a 12 Volt automotive battery.
2.Disconnect all loads from generator.
3. Remove the brush cover (that's the rectangular plastic cover on the end of the generator.)
4. Plug a lamp or light into the generator before starting the engine. The light will illuminlate when ?Voltage has returned.
5. Start the engine with no load connected to the generator.
6. Attach the "-" lead of the battery to the negative brush. Very briefly touch the "+" lead of the battery to the positive brush. Remove as soon as Voltage builds up.

SOURCE: Problem with the Coleman Power Generators I have a

My owners manual says to take it to a service center to get the generator "excited" if it has no brushes. Hope this helps

SOURCE: cant start coleman powermate vantage 3500

Pull the spark plug and see if it is wet or smells of fuel. If not, then may have issue with the carburetor, fuel filter, float, etc. If plug appears fouled, replace the plug with new one correctly gapped. I have found that one can put an UNLIT propane torch into the carburetor and try starting. The propane won't flood the engine and can give an indication if the ignition is working. If the engine tries to start on the propane, then carburetor work is in order. Usually a problem with the float. Fuel filters and the embarassing thing of forgeting to turn on the fuel valve are farther down the list.