Suzuki 2002-2005 DF4/DF5/DF6 4-Stroke Outboards Service Manual, Page 88Get this manual
POWER UNIT 6-21
CYLINDERPISTONPISTON RING
Cylinder distortion Using straightedge and the thickness gauge, measure the gasket surface of the cylinder at total of six locations as shown in the figure09900-20803Thickness gauge Cylinder distortionService limit0.05 mm (0.002 in) If the measurement exceeds the service limit, resurface or replace the cylinder