1978 Johnson 175, 200, 235 HP Outboard Service Manual, Page 178Get this manual
Use the following gUide to interpret the current draw readingsThis, together with the symptoms listed in the next section on "Common Problems ," should help pinpoint the problemaNormal Current DrawNormal maximum current draw in the up and down modes (44 amps up 29 amps down) indicates the hydraulic pump-motor combination and relief valves are functioning to specsThe problem is elsewhere such as the pump control piston, malfunctioning check valve, or echanical bindingbLow Current DrawLower than maximum current draw in the full up or full down modes (less than 44 amps up less than 29 amps down) indicates generally :
1Leaking valves2Weak relief valves3Poor pump performance4Leaking 0- Rings on valve bodiescHigh Current DrawHigher than maximum curr nt draw in either full up or full down indicates:
1Electric motor malfunctioning electrically or mechanicallyRemove motor and check for bindingCheck no load current draw (18 amps max)