1998 Yamaha 25J, 30D, 25X, 30X outboards Factory Service Manual, Page 134Get this manual
TILT ROD
SERVICE POINTS
WARNING
prevent the hydraulic fluid from spurting out due to internal pressure, the outboard should be kept fully tilted up (the tilt rod at full length)After removing the tilt motor or oil reservoir, do not push the tilt rod downThis may cause hydraulic fluid to spurt out from the port