Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 144Get this manual
Crankshaft (and End Cap) Bearings 1After cleani ng crankshaft, grasp outer race of crankshaft ball bearing (installed on lower end of crankshaft) and attempt to work race back-and- forthThere should not be excessive play2Lubricate ball bearing with light oilRotate outer bearing raceBearing shou ld have smooth action and no rust stainsIf ball bearing sounds arfeels or has "catches ," remove and discard bearing(Refer to "Powerhead Removal and DisassemblyCrankshaft Removal and Disassembly"
Reed Block Assembly
IMPORTANT: DO NOT remove reeds from reed blocks, unless replacement is necessaryDO NOT 1urn used reeds over for re-useReplace reeds in sets only1Thoroughly clean gasket surfaces of reed blocks and reed block housingCheck for deep groovescracks and distortion that could cause leakageReplace parts as necessaryCheck for wear (indentations) on face of each reed blockReplace block(s), if reeds have made indentationsCheck for chipped and broken reedslower Ball