Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 147Get this manual
Table of Contents Page Specifications Special Tools 46-1 Cylinder 610ck 46-2 Crankshaft 46-4 Preparation for Powerhead Removal 48-6 Powerhead Removal 48-7 Removing Powerhead Components 48-7 Ignition Components 48-7 Charging and Starting System Components 487 Fuel Components 48-7 Harness and 6atlery Cable Removal 46-7 Oil Filter, Thermostat, and Exhaust Cover Removal 48-8 Cylinder Head Removal 46-8 Powerhead Disassembly 48-8 Crankshaft and Piston Removal 48-8 Piston Disassembly 48-10 Inspection 4B-10 Cylinder 60re 46-10 Measuring Cylinder Bore 4B-10 Balance Piston 4B-11 Crankcase Cover Bore 4B-11 Piston 48-1 Measuring piston 4B-11 Piston Pin 46-12 Pislon Rings 46- 12 Piston ring side clearance 48- 12 Piston ring end gap clearance 48-12 Crankshaft 46-13 Checking Main Bearing Clearance 48-13 Checking Connecting Rod Bearing Clearance 48-14 Thenmostat 46-15 Oil Pressure Switch 48-15