2006-2010 Suzuki DF150 / DF175 4-Stroke Outboards Service Manual, Page 275Get this manual
POWER UNIT
(3) Calculate the pistoncylinder clearance (Clearance equals difference between piston diameter and cylinder bore measurements)Piston to cylinder clearance Standard: 0.085 0.105 mm (0.0033 0.0041 in) Service limit: 0.150 mm (0.0059 in) If clearance exceeds service limit, replace piston andor cylinder or bore cylinderIdentification of oversize pistonpiston ring One oversize pistonpiston ring components, 0.50 mm, is availableOversize pistonpiston ring are marked as shown, below Piston Oversize 0.50 mm 1st2nd Piston ring Oversize 0.50 mm I.Dmark 50