1992 Johnson Evinrude "EN" 40 thru 55 Service Manual, P/N 508143, Page 96Get this manual
r:t6l6Check for leaks between emulsion pickup tube and carburetor body: Invert carburetor body and fill idle circuit with isopropyl alcohol Check for leaks at point If leak occurs, blow dry and apply drop of OMC Ultra Lock at point Assembly
[!!] 1Install new high speed nozzle gasket
1182Install the float and inlet valve assembly 183Install the intermediate air bleed orifice [!!] 4Install the high speed orificegasket, and drain plug
1185Install components of slow speed needle :
Place one O-ring on threaded end of adapter sleeve Lubricate other O-ring with outboard lubricant and place in groove on needle head Install adapter sleeve and torque to 30-35 inIbs(3-4 Nm) Install needle and springTurn in carefully until it lightly contacts seat Back out needle for initial settingturns for 40 or 2112 turns for 48, 50