Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 265Get this manual
Gear Housing Specifications (Counter Rotation) SPECIAL TOOLS REQUIRED for DISASSEMBLY and REASSEMBLY COUNTER ROTATION
ForwardReverse Gear Backlash and Pinion Depth
Pini on Depth 0.025 in(0.635mm) with Tool 91-12349A2 Using Disc #2 and Flat #4
Tool Description
Belleville Washer Needle Bearing Driver ai' Seal Driver Universal Puller Plate Drive Shaft Bearing Retainer Wrench Backlash Indicator Rod Drive Shaft Nut Wrench Bearing Carrier Retainer Wrench Torque Wrench (lbin Puller Bolt Dial Indicator Holding Tool Forward Gear Installation Tool
Forward Gear Backlash 1.64:1 and 1.75 :1 Gear Ratio 0.017 into .028 in(0.431mm to .711mm) Pointer on li ne mark #1 Reverse Gear Backlash 0.050 into .060 in (1.27mm to 1.524mm)
12-54058
91 -15755
91 -31108
91 -37241
91-43506
91-53459
91 -56775 91 -61 069
91-66274
Lubricant Capacity 28 floz(0.828 liter) NOTE: Before filling gear case, apply 10-15 PSI of air pressure at the VENT holePressure should not drop for 15 seconds while alternately applying 2-3 pound force to the top of the shift shaft in the fore and aft directionWater Pressure Idle4psi Poppet Valve Opening 6-1 26-34 psi W.O.TpsiNote: The water pump assembly is LOW pressure ,