1971 Johnson 125HP outboards Service Manual, Page 70Get this manual
Figure 6-7Disconnect Shift Wire Terminals
Figure 6-8Gearcase Attaching Screws
dApply oil or liquid soap to cable sleeve to ease its passage through hole in exhaust housing adapter when removing gearcaseeMark gearcase and adjustable trim tab so it can be reinstalled in the same pOSitionRemove screw and trim tabSee Figure 6-8fUsing 12 inch socket and short extension, remove screw from inside of trim tab cavitySee Figure 6-8gUsing 58 inch thinwall socket, remove cOWltersunk screwSee Figure 6-8hUsing 916 inch socket, remove f.our screws (2 each port and starboard)See Figure 6-8iRemove gearcase assembly and cable from exhaust housingTake care to avoid damaging shift cableDo not lose plastic water tube guidesThese are used only to guide water tubes into pump grommets during reassembly
Figure 6-9Lower Motor Cover Screws