Re: 84 Mariner Power Trim
Ruebanks, It may be that the "Up" trim solenoid is either defective or not receiving proper voltage. You can jumper the solenoid (connect battery lead to positive side of solenoid primary winding) to see if the motor runs. If it runs and the motor tilts up, check the voltage and ground connections to the solenoid. If they are good, it is likely the solenoid is bad.