1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 234Get this manual
WARNING After In.tallallon I, complete (and before operating engine), check that boat will turn to right when steering wheel Iturned right and thet boawllliurn left when steering wheelis turned left Check .Ieerlng thru full range (left and right) at all tilt angleto as.ure Interference-free
movement
Ride-Guide Steering Maintenance Instructions
Mainlellllllce inspection is owner's responsibility and must be performed at intervals specifiedfollowing:
WARNING
Core of each steering cable (transom end) must be fully retracted Into cable housing before lubricating cableIf cable Is lubricated while extended, hydraulic lock of cable could occur
Normal ServiceEvery 50 hrof operation or 60 days (whichever comes Ilrst) Severe ServiceEvery 25 hrof operation or 30