Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 76Get this manual
HONDA BFSOASBA
FUEL TUBE INSTALLATION
11I -WAY JOINT PIPE SIDE
Install the fuel tube so that its longer straight side is toward the 3-way joint pipe side and the shorter straight side is toward the No2 carburetor side
2) After installing the carburetor assembly on the outboard motor, check that the fuel tube is not interfering with the 32 mm flange bolt that is tighening the intake manifold
[2] LONGER
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3) After tightening each fuel tube, check that the tubes are not in contact with the port, rib andor bolt of the intake manifoldAdjust by turning the tube, if necessary