Suzuki 2002-2005 DF4/DF5/DF6 4-Stroke Outboards Service Manual, Page 81Get this manual
6-14 POWER UNIT Valve stem runout Measure the valve stem runout09900-20602Dial gauge 09900-20701Magnetic stand 09900-21304"V" block set Valve stem runoutService limit0.05 mm (0.002 in) If the measurement exceeds the service limit, replace the valve Valve head radial runout Measure the valve head radial runout09900-20602Dial gauge 09900-20701Magnetic stand 09900-21304"V" block set Valve head radial runoutService limit0.08 mm (0.003 in) If the measurement exceeds the service limit, replace the valve