}{unter,

I think the difference in the flywheels is due to the actual height of the engine
from the chassy in the pullstart and non pullstart mounting application.

AznAbyss952,

The hand held starter is basically a handheld electric motor, with an armature extending out of the end of it to which you attach a round wheel with a rubber ring around the circumference(like the one in a box) They usually need to be connected with 2 clips to a twelve volt, like a car battery. They look kind of awkward to use to me.