1980 Johnson 4HP Service Manual, Page 22Get this manual
REMOVAL OF CARBURETOR AND LEAF VALVE ASSEMBLY Remove screw and choke knobFigure 3-2Remove slow speed adjustment knobRemove front and rear screws retaining lower motor coverSee Figure 3-3 Disengage starboard side of cover from port side See Figure 3-4Remove coverSee Figure 3-5
Figure 3-4Separating Lower Motor Cover