1978 Johnson 55 HP Outboards Service Manual, Page 30Get this manual
REASSEMBLY OF CARBURETORS TO MOTOR aPlace new gaskets in position on studs on manifoldPlace carburetors on studs and fasten in place with nuts and lockwashersbConnect fuel hose between carburetors using new nylon hose strapsConnect choke and throttle linkagesSee Figure 3-23cConnect choke solenoid springSee Figure 3-23
dInstall air silencer (using new self locking screws), if removed from carburetors, and connect fuel hoses to fuel pump and filter using new nylon hose strapseConnect drain hose and install air silencer cover
CARBURETOR ADJUSTMENTS
THROTTLE AND CHOKE LINKAGE aTo synchronize carburetor throttle valves, be sure roller is not contacting cam, loosen upper throttle lever screwEnsure throttles are closedApply finger-pressure to upper throttle shaft adjusting leverTighten upper throttle lever screwSee Figure 3-23AbTo synchronize carburetor choke valves loosen choke link fastener screwHold chokes closed by applying finger-pressure to both upper and lower choke shaft levers; tighten fastener screw while holding chokes closedSee Figure 3-23