1974 Johnson 40 HP Outboard Motors Service manual, Page 20Get this manual
This ve nts the tank to the atmosphere and opens the fuel outlet"0" ring seals in the fue connectors shut off fuel flow when the line is disconnected from the tank or motorTo facilitate draining and cleaning, drain screw has been provided in the fue tank: uppe housingSee Figure 3-4 REMOVAL OF CARBURETOR FROM MOTOR
aDisconnect fuel line at carburetorRe move low speed arm and link from low speed needleRe move choke link from choke leverSee Figure 3- 5D NOTE
If choke link screw is removed, manual choke
must be re- adjusted so choke opens and closes fully
NOTE Figure 3- 6Intake Manifold dRemove cut-out switch hose from intake manifoldRemove eleven screws attaching intake manifold to power headSee Figure 3-6Remove intake manifold from power headeRemove screw attaching le af plate to rankcase and remove leaf alve assembly and gasketSee Figur 3-6