1974, 115 HP Johnson. I replaced the ignition switch, which works fine. It was the first time I took my Powershift II control assy apart. The only screw I took out that I didn't need to was the Warm up link set screw in the front of the unit. Anyway, I got the control back together with no problems (at least I thought so). Took the boat for a run. If I move the throttle very slowly from neutral to forward, the engine fails to go into gear but will rev up as I advance the throttle. If I move the throttle from neutral to forward quickly, engine goes into forward with no problem. The control assy went back together so easy I didn't think that was the problem, but it's one heck of a coincidence. Any suggestions?