Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 158Get this manual
Hydraulic System Troubleshooting Refer to disassemblyreassembly instructions (following) if disassembly is required when servicing
2Check for external leaks in the power trim systemReplace defective part(s) if leak is found
IMPORTANT: If cut or damaged O-rings are found, inspect machined surfaces for scoring, burrs or debris3Check for discharged accumulator35 to 50 lbft(47-68 Nm) of pulling force must be attained when tilting outboard from full "down" to full "up" position with manual release valve lever in the open positionIf more than 50 lbft(68 Nm) of force is required, replace accumulator
IMPORTANT: After debris or failed components have been found (during troubleshooting procedure) it is recommended that unit be disassembled completely and ALL O-rings be replacedCheck ball components and castings must be cleaned using engine cleaner and compressed air or replaced prior to reassemblySupport outboard with tilt lock lever when servicing manual tilt system1Check manual release cam adjustmentCam must open and close freely Adjust cam link rod as necessary