1998-2006 Yamaha F20/F25 Outboards Service Manual, Page 113Get this manual
OIL PUMP 5-20 EXPLODED DIAGRAM 5-20 REMOVAL AND INSTALLATION CHART 5-20 SERVICE POINTS 5-21 Cylinder head inspection 5-21 Oil pump inspection 5-21 CAMSHAFT AND VALVES 5-22 EXPLODED DIAGRAM 5-22 REMOVAL AND INSTALLATION CHART 5-22 SERVICE POINTS 5-24 Valve inspection 5-24 Valve spring inspection 5-25 Rocker arm and rocker arm shaft inspection 5-26 Camshaft inspection 5-26 Valve guide replacement 5-27 Valve installation 5-27 Valve seat refacing 5-28 Valve seat cutting guidelines 5-28 OIL FILTER CARTRIDGE, THERMOSTAT, AND EXHAUST COVER 5-30 EXPLODED DIAGRAM 5-30 REMOVAL AND INSTALLATION CHART 5-30 SERVICE POINTS 5-32 Thermostat inspection 5-32 CRANKCASE, CRANKSHAFT ASSY AND CYLINDER BODy 5-33 EXPLODED DIAGRAM 5-33 REMOVAL AND INSTALLATION CHART 5-33 SERVICE POINTS 5-36 Cylinder inspection 5-36 Piston inspection 5-36 Piston-to-cylinder clearance 5-37 Piston pin inspection 5-37 Piston ring inspection 5-37 Crankshaft inspection 5-38 Main-bearing oil clearance 5-38 Big-end oil clearance 5-40 Piston ring installation 5-41 Piston installation 5-41 Oil seal installation 5-42