Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 270Get this manual
Pre-Disassembly Inspection Propeller Shaft
INSPECTION
Gear Housing and Component Disassembly
Water Pump Assembly
REMOVAL
1Inspect the propeller shaft for side to side movement, as follows:
aPosition the dial indicator on the propeller shaftbc
1_ Remove the water sealwater tube coupling assembly, and the water pump screws
Push the propeller shaft to one side and zero the dial indicatorMove the propeller shaft to the opposite side while
observing the dial indicatorWithout rotating the