Suzuki 2002-2005 DF4/DF5/DF6 4-Stroke Outboards Service Manual, Page 84Get this manual
POWER UNIT 6-17 NOTE: Clean and assemble the cylinder head and the valve componentsFill the intake and the exhaust ports with solvent in order to check for leaks between the valve seat and the valveIf any leaks occur, inspect the valve seat and the face for burrs or other things that could prevent the valve from sealing
VALVE GUIDE REPLACEMENT
Be careful not to damage the cylinder head when replacing the valve guide1Using the valve guide remover, drive the valve guide out from the combustion chamber side toward the valve spring side09916-44310Valve guide removerinstaller