1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 165Get this manual
POWER UNIT 6-22 2Position cylinder head on cylinder3Apply engine oil to cylinder head bolts and tighten them gradually as follows(a) Tighten all bolts to 30 (3.0 kg-m, 21.5 lbft according to numerical order in figure(b) Loosen all bolts to (0 kg-m, lbft according to reverse order in figure(c) Again tighten all bolts to 30 (3.0 kg-m, 21.5 lbft according to numerical order in figure(d) Finally tighten all bolts to specified torque according to numerical order in figureCylinder head bolt60 (6.0 kg-m, 43.5 lbft