2006-2010 Suzuki DF150 / DF175 4-Stroke Outboards Service Manual, Page 246Get this manual
POWER UNIT
4Remove intakeexhaust camshafts, tappets and tappet shimsNOTE: All tappets and tappet shims must be installed in their original positionsFor ease of assembly, lay out tappets and record shim thickness for each individual cylindervalve position
5Loosen and remove twenty (20) cylinder head bolts in the order indicated in figureRemove cylinder head assembly and head gasket