1980 Johnson 4HP Service Manual, Page 23Get this manual
Remove hinge pin, float, and float valve, and unscrew valve seat and gasketdRemove high speed nozzleSee Figure 3-893334
1Fuel hose 2Nuts (2) 3Carburetor 4Screws (4) 5I ntake manifold
Figure 3-6Carburetor and Manifold
1Leaf plate assembIy 2Gasket 3Intake manifold
Figure 3-7Manifold and Leaf Plate AssembIy