1995 Johnson/Evinrude Outboards 40 thru 55 2-Cylinder Service Manual, Page 315Get this manual
Trouble Check Chart 1Cylinder leakdown Up check valve Manual release valve Impact relief valves Up relief valve Expansion relief valve Piston O-rings External leaks 2No reverse lock Filter valve and seat Impact relief valves Up relief valve Down check valve Manual release valve Piston O-rings External leaks 3No operation, motor runs Pump coupler Hydraulic pump Fluid level Manual release valve 4No tilt down Down relief valve Filter valve and seat Pump control piston Down check valve Manual release valve 5Slow performance Hydraulic pump Electric motor Mechanical binding Manual release valve Down relief valve Expansion relief valve Fluid level