1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 163Get this manual
When inspecti ng tapered beari ngsdetermine condit ion of rollers and in ner beari ng race by inspecting bearing cup fo pilli ng, scori ng, grooves, uneven wearimbedded part icles and or di scolorat ion from overheatingAlwa ys replace tapered beari ng and race as selRoller bearing co ndit ion is determined by inspecting the bear ing urfa ce of the shaft that th rolle beari ng supportsCheck shaft surface for pit ti ng, scoring, groov; ng, imbedded particlesune ven wear ndl or discoloration fr om overheatingThe shaft and bearing must be replaced, if the conditi ons desc ribed are found correct depth and ha ve Ihecorrecl mount of backlash to avoid noisy operat ion and pre mature gear fa il ure
As normal procedureall" rings and oil seal HOULD BE REPLA CED with out regard to appearanceTo prevent leakage around oil sealsa ppl Loctile GradeA" to outer dia meter of all oil sealsWhen using Loctite on seals threadssurfaces mu st be clean and dryTo ease installa tionapply Quicksilver Bearing Asse mbl Lubricant on all" ringsAppl Quick silver Beari ng Asse mbly Lubricant on 1.0of oil sea ls to prevellt seal wearTo pre vent corrosion damage after reassemblyapply Pe rfect Seal to external surfaces of beari ng carrier nd cove lIut threads pri or to installa tionDO NOT allow Perfect Seal 10 enter bearings or" ring rea