Honda Outboards BF40A/BF50A Service Manual, Page 336Get this manual
BF40A-BF50A CARBURETORIINTAKE MANIFOLD
Assembly is the reverse oder of disassembly[1] CARBURETOR INSULATOR (3) Note the installation direction
[2] CARBURETOR GASKET (6)
Do not reuse[1]-2 CARBURETOR GASKET [13] THROTTLE LINK ROD Install the throttle link rod with the "UP" mark facing toward the No1 carburetorTake care not to bend the throttle link rod