2006-2010 Suzuki DF150 / DF175 4-Stroke Outboards Service Manual, Page 255Get this manual
POWER UNIT
Measure cylinder head bore and tappet outside diameter to determine cylinder head to tappet clearance$ 09900-20202: Micrometer If measurement exceeds service limit, replace tappet or cylinder headCylinder head bore to tappet clearance Standard: 0.025 0.066 mm (0.0010 0.0026 in) Service limit: 0.150 mm (0.0059 in) Tappet outer diameter Standard: 33.959 33.975 mm (1.3370 1.3376 in) Cylinder head bore Standard: 34.000 34.025 mm (1.3386 1.3396 in)