1968 Johnson Outboard Service Repair Manual 1-1/2 (1.5) HP P/N JM-6801, Page 20Get this manual
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Figure 3-9 Intake Manifo1d and Leaf Valve Assembly dClearance under leaf stop should bending leaf stopSee Figure 3-9CARB URETOR BODY
persists, drill 18 inch hole through the center of the depth