1978 Johnson 175, 200, 235 HP Outboard Service Manual, Page 179Get this manual

1978 Johnson 175, 200, 235 HP Outboard Service Manual, Page 179

3Reverse Lock Does Not HoldaFilter valve seatbImpact sensor valvecManual release valvedTilt cylinder valves or sealseReverse lock check valvefOil lines 9Unit Locked in Full Tilt Position aSee page 9-8
TROUBLESHOOTING THE ELECTRICAL SYSTEM
See Power Trim and Tilt Wiring Diagram in back of manualInstruments required: Voltmeter, ohmmeter BOTH UP AND DOWN CIRCUITS (Turn on key switch for these tests)