2007 Evinrude E-Tec 75, 90 HP outboards Service Manual, Page 289Get this manual
TRIM AND TILT ELECTRICAL CIRCUIT TESTS Connect to 100 DC ammeter in series between the battery side of the starter solenoid and the red lead to the trimtilt relay moduleTest results include three basic possibilities: ALow current draw Check for: Valves leaking Relief valve springs weak Pump damaged O-rings leaking Check valves fouled or damaged Manual release valve damaged BHigh current draw Check for: Pump binding Motor binding Cylinder binding Valves sticking CNormal current draw, slow operating speed Check for: Impact valves damaged Check valve or shuttle valve malfunctioning Manual release valve damaged
1Red lead
Observe ammeter and stopwatch while running hydraulic unit through several complete cyclesCompare test results to the values listed: