Install a short clear hose from the carburetor to a container of fuel. This illuminates the fuel system and tells you that the carbs are able to pump fuel
Not a carbon seal set up
there is a needle bearing and a seal there
bearing likely frozen to shaft
when that happens it tears up the tube the driveshaft runs thru
they have a repair kit for this
comes with a part to glue/ drive into the tube
Check the grounds under the coil mounting bolt in the rear box
disconect the white wire from the coil and connect it to a grounded test light, crank the motor.
if the test light ‘flickers’ every thing back from there is good
if not test stator
Let’s try that again. Do the small wires going to the start solenoid have a positive and a ground to activate the solenoid, when you press the start button