Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 166Get this manual
Crankshaft Installation 1lubricate the crankshaft bearing surfaces with engine oiL 2Lubricate balance rod journal with engine oi l3Install balance rod on crankshaft
8Lubricate the oil seals lips with oil9Install upper and lower oil sealsPosition oil seat lips as shown10If removedinstall dowel pins
4 Carefully lower crankshaft into place5Lubricate the connecting rod journals with engine oil
6Assemble the connecting rods to the crankshaftInstall the connecting rod capsaligning the code letter marked on the connecting rod and cap