2009-2010 Suzuki DF70A DF80A DF90A Outboard Service Manual, Page 144Get this manual
1D-33 Power Unit Mechanical: 3) Apply engine oil to cylinder head bolts and tighten them gradually as followsa) Tighten all cylinder head bolts to 50 percent () of specified torque according to sequence in figureTightening torque Cylinder head bolt (1st step) [10 mm]: 35 Nm (3.5 kgf-m, 25.5 lbf-ft) Cylinder head bolt (1st step) [8 mm]: 12 Nm (1.2 kgf-m, 8.5 lbf-ft) "15" "13" "11" "12" "14"
4) Install the INand EXcamshaftsRefer to "Camshaft, Tappet and shim Removal and Installation" (Page 1D-25)5) Install the timing chainRefer to "Timing Chain, Chain Tensioner and Camshaft Sprockets Removal and Installation" (Page 1D-20)
Cylinder Head Disassembly and Assembly
Disassembly 1) Using valve lifter and attachment, remove valve cotters (1) while compressing valve spring
Z9J0111406017
Special tool (A): 0991619030 (Valve lifter) (B): 0991614521 (Valve lifter attachment) (C): 0991684511 (Tweezers)