Suzuki 2002-2005 DF4/DF5/DF6 4-Stroke Outboards Service Manual, Page 79Get this manual
6-12 POWER UNIT Water jacket Inspect the water jackets for clog or obstructionClean the water jackets if necessary VALVEVALVE GUIDE
Using the micrometer and bore gauge, take the diameter readings on the valve stems and the guides in order to check the guide to stem clearanceBe sure to take readings at more than one place along length of each stem and guide09900-20205Micrometer
Valve stem outside diameter Measure the valve stem outside diameter using the micrometerValve stem outside diameterStandardIN 5.460 5.475 mm (0.2150 0.2156 in) EX 5.440 5.455 mm (0.2142 0.2148 in)