1991 Johnson/Evinrude EI 60 thru 70 outboards Service Manual, Page 324Get this manual
Trouble Check Chart 1Tilt only leakdown 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
3No reverse lock Filter valve Manual release valve Tilt piston or seals Reverse lock check valve Oil lines 4Slow performance Hydraulic pump Electric motor Trim-down relief valve Mechanical binding Expansion relief valve