2006-2010 Suzuki DF150 / DF175 4-Stroke Outboards Service Manual, Page 274Get this manual
Quality of the image is intentionally reduced!
POWER UNIT
150 mm (1.96 in) 290 mm (3.54 in)
PISTON TO CYLINDER CLEARANCE (1) Measure the piston diameter at point mm (0.354 in) above the piston skirt at right angle to the piston