1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 194Get this manual
6-51 POWER UNIT (6) Remove conrod and conrod cap from crank pin(7) Using scale on Plastigauge envelope, measure Plastigauge width at its widest pointConrod big end oil clearance Standard0.020 0.040 mm (0.0008 0.0016 in Service limit0.065 mm (0.0026 in If measurement exceeds service limit, replace conrod bearing