I had never seen that design before Dave, is this the first thing it was used in? FWIW, that part seems to work fine, but inside the knuckle section it's really rough, and two of the four couplers on my two engines don't open all the way without help. I'm figuring I'll have to pull the rivet and smooth the insides and the knuckle to get them working properly.
Does this coupler use the standard electrocoupler knuckle?