1980 Johnson 2HP Service Manual, Page 21Get this manual
3-4 Remove five screws attaching carburetor body to float chamberRemove low-speed nut, then remove needle valveRemove packing from carburetor body and float chamber, using care to avoid damaging threads in carburetor bodydRemove hinge pin, float, and float valve, and unscrew valve seat and gasketRemove high-speed nozzle and boss gasketSee Figure 3-"5
CLEANING,
GENERAL INSTRUCTIONS
AND REPAIR
Clean parts, except cork float, in solvent and blow dryDO NOT dry parts with cloth as lint cause trouble in the reassembled carburetorsure particles of gaskets are removed from gasket surfacesFlush out passages in the carburetor body and float chamber with solvent and remove gummy deposits with Engine CleanerCertain solvents will not remove this gum which accumulates particularly in the float chamber and the needle valvesFLOAT AND NEEDLE VALVE Inspect float and arm for wear or damageIf the float has oil-soaked, discard it and instaH new Check float arm wear in the hing pin and needle valve contact areas, and replace if necessaryInspect hinge pin for wear, which tionReplace if necessary