1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 184Get this manual
CAUTION Removal of lower crankshaft bearing will damage bearing and will require replacement4Inspect lower be aring for roughness and excessive loosenessR emove retaining ring and be aring only if necessary
Crankshaft Inspection
Inspect crankshaft to drive shaft splines for we ar(R eplace crankshaft, if necessary heck crankshaft for straightness [(0.003 in(0.076mm) maximum](R eplace as necessary Inspect crankshaft oil se al surfacesS aling surfaces must not be grooved, pitted or scratched(R eplace as necessary heck all crankshaft be aring surfaces for rust, water marks, chatter marks, uneven we ar andor overhe ating(R efer to "C onnecting RodsIf necessary, cle an crankshaft surfaces with crocus cloth as shown