Here are photos of Art DeKalb’s castings machined and installed. The castings are an alloy that machines very easily. I’m not sure its machined or installed as per original, but it fits and it works. I didn’t have any original parts to use as a pattern, and the Johnson parts drawing doesn’t show their relative orientation.
The cable is part of a blade clutch cable from a Toro mower. It’s a lot more flexible than the original, since the stiff steel wire is replaced by a braided cable. The sheath is lined inside with some type of plastic, so it slides freely.
The contraption on the top of the compression release cylinder closes off the bypass port on the starboard cylinder. This forces more fuel / air mix to the port cylinder for starting. Similar system was used on the S, P, and V series motors.
Hope this clears it up.
Tom