Broken rotor button.
The torque from the main rotor would cause it to spin uncontrollably.
proly needs a tune up most likely plugs wires distrubutor cap and rotor button
Bad coil Bad rotor
Yes, they could.
To counteract the force of torque created by the main rotor. If not for that tail rotor, the torque would cause the helicopter to spin continuously around.
Warped rotor(s).
Typically, when setting the timing initially, you would want the rotor to point to the #1 wire on the cap.
Assuming you mean distributor cap and rotor, yes, if you mixed up the firing order.
Check the coil and replace if bad. Should fix the problem.
Bad coil, rotor, distributor cap?
I would try distibutor cap and rotor.