1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 328Get this manual
Tilt Mode or Shallow Water Drive Mode
Igl While
running in the shallow water drive mode, or while the motor is tilted, the following valves and seals are pressurized and must hold pressure :
1Shock absorber valves
2Tilt piston seals
in the tilt cylinder piston
3Manual release valve Trim pistons seals 5Trim check valve