Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 234Get this manual
bPress crankshaft out of lower ball bearing as shown 27Remove and inspect water pressure relief valve components for debris or damageReplace components as required
51081 Press Powerhead Stand (91-812549) Crankshaft Ball Bearing Universal Puller Plate (91-37241)