Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 289Get this manual
bINSPECTION Float ValveNalve Seat
Check the float valve and valve seat for cracks, wear or damageReplace if necessary
[I]FLOAT VALVE
Check the float for damage, deformation or gasoline in the floatReplace if necessary
121 Replace
[4] VALVE SEAT
[5] FLOAT VALVE
Carburetor Float Level Height
Measure the float level height with the float installeda Set the float level gauge at right angles to the float chamber mating surface and measure the float level height at the highest place of the float1) Place the carburetor as shownPush the float lightly with finger and measure the distance between the float top and carburetor body when the float valve just starts to operateS TOOL]
FLOAT LEVEL GAUGE