1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 156Get this manual
Rudder NOT Locked IMPORTANT: Over-lightening 01 Hydr.steercables Is possibleCables should be adjusted tree slack but slill allow easy movement of the rudderIt engine vibrates violently In the trimmed out position100 much slack Is In the systemII high steering load ex ist, cables are adjusted too tight
AWARNING
Locknuts(fIn Figure 2, MU ST BE USED on bolts when fa stening Hyd rasteer cables to rudder arm
IWith engine Qut of wa tercen ter the Hydrastcer swivel plate on the engine sleering armLook ing toward rear of Ihe engine, the rudder (Figure 2) shou ld be cen tered (eq ual mo'c menl to each side)If necessaryloose jam nut (Figure 2)remove cable ends from rudder arm and adjust cable end to center the rudder Hei nstatl cable nd to