Hello, not sure if this feed is still active but I have a 1967/1968 Mercury 500 outboard with the Mercontrol throttle box. I’ve replaced the shift cable as it was damaged and am attempting to reassemble the unit. With it all put together I’ve found the throttle lever (left side) correctly shifts the gears however once it’s shifted into drive, the lever won’t move any father forward to open the throttle. I believe there is an issue with the connection between the left and right cams but I’m unsure.... if anyone has any advise I’d be happy to get it! Thank you!