Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 373Get this manual
2Position the new pinion bearing (with the cardboard shipping sleeve in place) onto the driver head, with the lettered and numbered side of the bearing oriented upward3Insert the driver with the bearing assembly, into position (by way of the propeller shaft bore) at the drive shaft bore as shown Forward Gear Bearing Cup
INSTALLATION
Forward Gear Backlash.017 into .018 in(0.431 mm to 0.457mm)
NOTE: If the forward gear, forward gear bearing and cup, or gear housing were not replaced, install the same quantity of shims that were taken out when cup was removedIf the forward gear, forward gear bearingcup, or gear housing were replaced, install O020 in(0.S1mm) of shimsNOTE: If backlash has already been checked and it has determined that it needs to be adjusted, (see Checking Forward Gear Backlash), adding or subtracting 0.001 in(0.02Smm) shims will change the gear backlash by the same amount