Suzuki 2002-2005 DF4/DF5/DF6 4-Stroke Outboards Service Manual, Page 92Get this manual
POWER UNIT 6-25 Piston ring end gap Measure the piston ring end gap with the piston ring in the lowest position of the cylinder bore09900-20803Thickness gauge Piston ring end gap Standard1st 0.20 0.35 mm (0.008 0.014 in) 2nd 0.35 0.50 mm (0.014 0.020 in Service limit1st 0.70 mm (0.028 in) 2nd 1.00 mm (0.039 in) If the measurement exceeds the service limit, replace the position ring