1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 333Get this manual
2Lubricate end cap bushing with Quicksilver 2-4-C Lubricant and install armature and motor frame into end capAs brushes contact commutator, release brush tension spring from ends of brush housings (returning springs to apply brush pressure to commutator)Install washer on each end of armature before installing armature into end cap (see inset)51007Screws [100 lbin(11.3 Nm)]
3Secure power trim unit in soft jawed vise
Trim Motor Reassembly
1Place brush tension springs on outer ends of brush housings to release tension on brushesa -