The flywheel is that big round , cake pan shaped part that the rope starting sheave is screwed on to. If you can get a strap wrench around the flywheel as suggested that will afford you the greatest leverage. Now, if you are creative, a strap wrench can be improvised by attaching a length of rubber strap ( use a discarded automotive reserpine belt ) to a length of 2X2 wood.
Joe B
