1974 Johnson 40 HP Outboard Motors Service manual, Page 56Get this manual
gInstall cylinder head, using new gasket coated lightly with OMC Gasket Sealing CompoundRecheck {or binding Tighten cylinder head bolts to specified torque, following the sequence shown in Figure 5-38 !:OJ NOTE
Re-torque cylinder head screws after motor test has been completed and molor has cool ed comfortable to touchSee Section 2
Figure 5-39 Fuel ReCirculating Valve