Mercury Electric Outboards 222 Thruster Service Manual, Page 24Get this manual
"TM" MODEL Disassembly DISASSEMBL Y
Remove cover, steering handle (a) and rotary switch (b) from control housing
IMPORTANT: Whenever removing or Installing screw (a) that secures control housing to shaft, first, remove steering handle from control housing In order to observe that screw threads (b) will not cut Into wiresIf necessary, Insert flat object Into shaft to separate wires from screwLook down into shaft to observe that screw threads (b) will not cut into wires when removing screwRemove screw (a) and lift housing from shaft