1988 Johnson/Evinrude "CC" 40 thru 55 Models Service Manual, Page 306Get this manual
Troubleshooting Power Trim and Tilt External Inspection Check the items listed below prior to troubleshooting the trim tilt systemI many cases, test of the "easy things" first will pinpoint the defective item and save you hours of valuable troubleshooting time1Visual InspectionLook for indications of external oil leaksCorrect the cause if leaks are noted2Proper Reservoir Oil LevelWith the motor fully tilted up, the fluid level should be even with the bottom of he fill plug threadsfluids approved for use in the trim and tilt reservoir are OMC Power Trim and Tilt Fluid or GM "Dexron II" automatic transmission fluid
INotel The only
3Manual Release ValveSeat the manual release valve by tightening the screw to torque of 5-6 N'm (45-55 in.lbs
4Mechanical BindingInspect stern brackets for bindingRetorque tilt tube nutTighten the nut to torque of 32-34 N'm (288-312 inIbs then back off 18 to 14 turn after torquing and inspect for bent rods on the trim and tilt cylindersTroubleshooting With Ammeter Place the thrust rod in bottom holeAmmeter readings are used to evaluate the pump output pressure by analyzing the current requirements (amps) of the electric motor that operates the pumpConnect 0-60 D.Cammeter between the positive (+) battery terminal and the heavy redwhite cableWhile observing the ammeter, operate the trim switch in both the in and out modes and compare the readings with those given in the chart belowThe specifications contained in the chart below are hydraulic static requirements of the power trimtiltDo not take readings while the boat is under powerSuch readings are unreliableMAXIMUM NORMAL CURRENT DRAW 45 45 55 45 55 18 (8500 rpm) MAXIMUM TIME IN SECONDS-