Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 327Get this manual
POWER TRIM
WARNING
Electrical wires passing through cowl openings must be protected from chafing or being cutFollow the recommended procedures outlined in Section 1D of this ManualFailure to protect wires as described could result in electrical system failure andor injury to occupants of boat
Testing Power Trim System With Test Gauge Kit (91-52915A6)
IMPORTANT: This test will not locate problems in the trim systemThe test will show if the system is correct after repairIf minimum pressures are not obtainable, the trim system requires additional repair
"UP" Pressure Check
IMPORTANT: Insure battery is fully charged before performing tests1Tilt outboard to full "Up" position and engage tilt lock lever2Slowly remove "Fill" plug to bleed pressure from reservoir3Remove circlip securing manual release valve and unscrew release valve from trim assembly