1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 414Get this manual
Trouble Check Chart 1Tilt only leak down Trim-up relief valve Manual release valve Tilt piston or seals Tilt check valve Oil lines
2Tilt and trim leakdown
Trim pistons or seals Trim cylinder sleeves Trim check valve Expansion relief valve Filter valve Manual release valve Tilt piston or seals Reverse lock check valve Oil lines Hydraulic pump Electric motor Trim-down relief valve Mechanical binding Expansion relief valve