1988 Johnson/Evinrude "CC" 40 thru 55 Models Service Manual, Page 307Get this manual
Use the following guide to interpret the current draw readingsThis, together with the symptoms listed in Trouble Check Chart should help pinpoint the problem 1Normal Current DrawNormal maximum current draw in the full up or full down mode indicates the hydraulic pump-motor combination and relief valves are functioning to specificationsThe problem is elsewhere, such as in the: abcPump Control piston Check valves Mechanical binding
2Low Current DrawLower then maximum current draw in the full up or full down mode generally indicates: aLeaking valvesbWeak relief valvescPoor pump performancedLeaking O-rings on valve bodies3High Current DrawHigher than maximum current draw in either the full up or full down mode indicates: aElectric motor malfunctioning electrically or mechanicallyRemove motor and check for bindingCheck no load current drawbPump bindingPump should turn with 0,25 Nm (2.25 inlbscRei ief valves not opening at correct pressure