Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 492Get this manual
Lubricate ball joint in steering eyes with SAE 30W Motor OilAssemble steering coupler between outboard steering arm extension brackets, using special washer head bolts (10-14000) provided and nylon insert locknuts, as shownIMPORTANT: With assembled steering coupler installed and before tightening special washer head boltslocknuts, check outboard alignmentDistance between centers of special washer head bolts MUST BE equal to distance between propeller shaft center lines, for proper steeringIf adjustment is necessary, temporarily remove special washer head boltlocknut from one steering eye and turn eye in or out to correct alignment Torque special washer head bolts to 20 lbft(27.0 Nm), then torque locknuts to 20 lbft(27.0 Nm)
Both steering eyes MUST BE threaded into coupler 34 in(19mm) minimum, and jam nut must be tightened against coupler to prevent coupler from turningTorque "jam" nut to 20 lbft(27.0 Nm)