Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 334Get this manual
Maintenance Instructions Maintenance inspection is owner's responsibility and must be performed at intervals specified, following:
Normal ServiceEvery 50 hrsof operation or 60 days (whichever comes first) Severe ServiceEvery 25 hrsof operation or 30 days (whichever comes first) Operation in salt water area is considered "Severe Service,"
1Carefully check steering system components for wearReplace worn parts
Ride Guide Steering Cable Attaching Kit Installation (92876A6)
Dual CableDual Outboard