Suzuki 2003-2007 DF60 DF70 Outboard Motors Service Manual, Page 169Get this manual
POWER UNIT
Cylinder bore wear (difference) Measure the cylinder bore in the thrust and axial directions at the three positions A, and as shownCheck for the followings: Difference of the measurements at the two positions(Taper) Difference between the thrust and axial measurement(Out-of-round) 09900-20530: Cylinder gauge set Service limit: 0.100 mm (0.0039 in) If the measurement exceeds the service limit, rebore or replace the cylinder
Piston to cylinder clearance Standard: 0.020 0.040 mm (0.0008 0.0016 in) Service limit: 0.100 mm (0.0039 in) If the measurement exceeds the service limit, replace the piston andor the cylinder or rebore the cylinderTo check the clearance, measure the following items: Cylinder bore at 50 mm elevation from the gasketed surface Piston skirt diameter at 15 mm elevation from the skirt end 09900-20530: Cylinder gauge set 09900-20203: Micrometer Standard: Cylinder bore 74.000 74.020 mm (2.9134 2.9142 in) Piston skirt diameter 73.970 73.990 mm (2.9122 2.9130 in)