Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 233Get this manual
23Remove crankshaft and place in powerhead stand as shownIMPORTANT: DO NOT remove crankshaft sealing rings from crankshaft, unless replacement of sealing ring(s) is necessaryUsually, crankshaft sealing rings do not require replacement, unless broken IMPORTANT: Keep same bearing races and roller bearings together
Safety glasses should be worn when removing or installing crankshaft sealing ringsIMPORTANT:
aBearing Race HalvesRoller Bearings
Inspect crankshaft ball bearing as outlined in "Cleaning and Inspection," followingIMPORTANT: DO NOT remove crankshaft ball bearing, unless replacement is required