Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 139Get this manual
IMPORTANT: Keep same bearing races and roller bearings together bPress crankshaft out of lower ball bearing as shown
51081 52315 Bearing Race HalvesRoller Bearings PressPowerhead Stand (913059IAI)Crankshaft Ball BearingUniversal Puller Plale (91-37241)
Inspect crankshaft ball bearing as outlined in "Cleaning and Inspection,ft followingIMPORTANT: 00 NOT remove crankshaft ball bearingunless replacement is required