Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 80Get this manual
HONDA BFSOAmSBA
cINSPECTION
FLOAT LEVEL HEIGHT With the carburetor in an upright position, measure the distance between the float top and the carburetor body when the float just contacts the float valve
Standard float height
14 mm (0.6in1