Re: 1958 johnson 35p
When manually shifting it at the motor (not running) and spinning the prop by hand, it should just start engaging equally relative to the high bumps on the interlock bar. Adjust it if it doesn't.
Ok, having said that, lets back up. How much play and slop is there in the linkage? When you start to move the shifter lever, the rod should start to move up and down with no delay or slop. If there is slop, you will have to locate and correct the cause. There are two swivel pins in the linkage between the shift handle and the shift shaft that goes into the exhaust housing. Are they or the slots they go into worn? Once the shifter shaft disappears inside the exhaust housing, there is a clevis inside. Many of the clevis' have broken. Many of the shift shafts have broken also.