Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 188Get this manual
Troubleshooting General
When problem is encountered with the Power Trim system, the first step in troubleshooting is to define whether the malfunction is in the electrical system or in the hydraulic systemRefer to the following problems and determine which system is at faultAfter determining in which system the failure has occurred, more detailed checks and tests then can be performed to isolate the exact cause of the problem
Trouble Chart