Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 18Get this manual
MAINTENANCE
6Steering Cable Grease Fitting (If Equipped) Rotate steering wheel to fully retract the steering cable end (a) into the outboard tilt tubeLubricate through fitting (b)
WARNING
The end of the steering cable must be fully retracted into the outboard tilt tube before adding lubricantAdding lubricant to steering cable when fully extended could cause steering cable to become hydraulically lockedAn hydraulically locked steering cable will cause loss of steering control, possibly resulting in serious injury or deathLubricate Points With Light Weight Oil7Steering Link Rod Pivot Points Lubricate pivot points