1974, 115HP Johnson. No forward gear, just reverse. Found the pivot bolt on the linkage that attaches to the engine lever and the shift rod backed out. This caused the linkage to separate from the shift rod. Thought I had the problem beat when I hooked the shift rod back up to the linkage and tightened the pivot bolt, but now I can't move the throttle in reverse. Throttle lever moves forward, but feels jammed in reverse. I didn't change the length of anything, so I'm not sure how everything can be so out of whack. I even disconnected the shift linkage from the shift rod to see if the shift rod was binding things up, but even with it disconnected I can't move the throttle to reverse. I'm totally dumb-founded. I have the service manual specific for my engine, but it's clear as mud when it comes to installing throttle linkage. Anybody out there who can help????