Snowblower starter
Agree. Does the rust shown cause drag on the armature? Get it free and cleaned up, a light amount of grease in the bushings, fine sandpaper the commutator, and find something fine like a exacto to clean out between the commutator segments and I bet it works fine. That really does not look all that bad. I've got some outboard (12V) ones operating that would not turn and were full of rust, and looked horrid.