Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 240Get this manual
FORWARD GEAR ASSEMBLY COMPONENT DISASSEMBLY Note: Forward gear can only be removed from gear housing after drive shaft and pinion gear have been removed1Reach into gear housing and lift out forward gear FORWARD GEAR ASSEMBLY COMPONENT REASSEMBLY Note: Complete the instructions in this section only if the assembly components have been disassembled and repaired or replaced1Using suitable mandrel, press the tapered roller bearing onto the forward gear by pressing on the inner bearing race, until the bearing bottoms outon the gear
IMPORTANT: DO NOT remove tapered bearing or needle bearings from forward gear unless replacement of bearings is required (Bearings cannot be reused after they have been removed
2If inspection determines that replacement of forward gear tapered bearing is required, separate gear from bearing as follows: aInstall Universal Puller Plate (91-37241) between forward gear and tapered bearingPlace assembly on press and press gear out of bearing with suitable mandrel