Suzuki 2003-2007 DF60 DF70 Outboard Motors Service Manual, Page 171Get this manual
POWER UNIT
Piston ring end gap Measure the piston ring end gap with the piston ring in the lowest position of the cylinder bore09900-20803: Thickness gauge Standard: 1st 0.15 0.30 mm (0.006 0.012 in) 2nd 0.20 0.35 mm (0.008 0.014 in) Service limit: 1st2nd 0.70 mm (0.028 in) If the measurement exceeds the service limit, replace the piston ringPiston ring free end gap Measure the piston ring free end gap09900-20102: Vernier calipers 1st 2nd Service limit: 1st 2nd Standard: Approx7.7 mm (0.30 in) Approx10.4 mm (0.41 in) 6.1 mm (0.24 in) 8.3 mm (0.33 in)