1991 Johnson Evinrude EI 60 Loop V Models 150, 175 outboards Service Manual, Page 273Get this manual
Manual ReleaseUP 1The engine can be manually raised or lowered through its entire operating range by opening the manual release valve2When the manual release valve is opened and the motor is manually lifted toward the tilt position, fluid flows from the top of tilt cylinder, through the manual release valve, to the bottom of the tilt cylinder3To allow for the volume differential caused by the piston rod, additional fluid is drawn from the reservoir through the manual release valve ventDRC3464