1977 Johnson 2HP Outboards Service Manual, Page 22Get this manual
3-5 LEAF STOP INTAKE MANIFOLD
GASK ET LEAF
Figure 3-9Intake Manifold and Leaf Valve Assembly
Figure 3-10Leaf Valve Disassembled adjust if necesFigure 3-11Re-Seating Plug
dClearance under leaf stop should 1 4" (6.3 sary bending leaf stopSee Figure 3-9CARB URETOR BODY gum air
out the jets and passages, and the venturi, making sure varnish deposits remainDry after cleaning with compressed clean for final reassembly
Check gasket surfaces for nicks, scratches, distortionSlight irregularities corrected with the use of surface plate and clothCheck throttle and choke shafts for excessive playCheck operation of choke and throttle valves to sure they correctly shut off air flow, yet move freely without bindingReplace carburetor body if valves shafts excessively worn damagedEJNOTE The threaded edges of the choke and throttle valve attaching screws staked during carburetor assembly to prevent 10ss during operationDisassembiy of these valves is possible but replacement of the carburetor body is recommendedPLUGS
If necessary, remove plug to out slow speed orifice holesSee Figure 3-12If leakage occurs at plug smart tap with hammer and f1at end punch in the center of the plug wil1 normal1y correct this conditionSee Figure 3-11If leakage persists, drill 1 inch (3.2 hole through the center of the plug to depth of not than 1 16 inch (1.6 below its surfaceWith punch carefully out the plugSee Figure 3-12