1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 9Get this manual
Power Trim System GENERAL INFORMATION The power trim system is filled at the manufacturer and is ready for useTrim outboard through entire trailering range several times to remove any air from the systemThe trim system is pressurized and is not externally ventedThe outboard can be raised or lowered manually by loosening the manual release valve four turnsThe trim "out" angle of this outboard is not adjustableThe trim system has an internal valve which will automatically stop the outward trim travel at 20_ when engine RPM is approximately 2000 RPM or higher; outboard also has to be in water and in gearThe outboard can be operated beyond the 20_ trim limit for operating outboard in shallow water if engine RPM is kept below approximately 2000 RPM
Trim "In" Angle Adjustment
MODELS WITH POWER TRIM