2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 271Get this manual
TRBL SHTG
Troubleshooting
Troubleshooting the power tilt unit (Power tilt model)
Symptom 1: Power tilt unit does not operate Symptom Power tilt relay does not operate Cause Blown fuse Power tilt switch malfunction Short, open, or loose connection of the wiring harness Power tilt relay malfunction Power tilt motor does not operate Short, open, or loose connection in power tilt motor circuit Power tilt motor malfunction Power tilt motor operates, but the tilt ram does not extend Manual valve left open Insufficient power tilt fluid Power tilt fluid leakage Clogged filter Clogged fluid passages Malfunction of the power tilt unit internal parts