1999 "EE" 90, 115 FFI, 150, 175 V4, V6 FFI Outboards Service Manual, P/N 787024, Page 164Get this manual
Powerhead Servicing Removal
To avoid accidental starting of engine, twist and remove all spark plug leads before beginning service
INote Because of the number and types of fasteners (screws and
nuts), it might be appropriate to reinstall fasteners in their holes as engine components are removed This will simplify identification and assembly
1Remove the screws securing the cover to the lower motor cover