Last autumn/early winter a deer hunter shot a female coyote on my property (located in West central NJ). She was relatively thin but stretched across the tailgate of his truck. Initially I thought that he had shot someone's dog. I ran into him yesterday and asked what she weighed - 54 lbs.
I never gave a lot of credibility to the coywolf talk, but that girl was not pure coyote. I would guess that in good flesh she would weigh another 5 or 10 pounds. What's the largest 'coyote' that you have heard of ?