1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 165Get this manual
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POWER UNIT 6-22 2 Position cylinder head on cylinder3 Apply 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 numeric