Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 23Get this manual
HONDA 6F2OA95A
DENGINE DOES NOT RUN SMOOTHLY
Engine starts but stops soonPoor idle performance
1) Wet fouled spark plug caused from excessive choke application
2) Faulty spark plug
Start the engine with the choke fully open and the throttle fully closedadjust, or replaceproperlyproperly
3) Carburetor synchronization misadjusted -Adjust 4) Carburetor pilot screwistop screw misadjusted -Adjust 5)Carburetor slow circuit clogged with dirt -Overhaul6) Overflowed carburetor -Drain
the carburetor and prime againIf still not good, overhaul the carburetor
Engine speed does
7) Secondary air sucked caused from damaged carburetor insulator gasket "Replace1) Choke not returned properly-Return
2)Throttle cable misadjusted -Adjust 3)Propeller mismatched -Select
4) Engine overheatsAlert system function -Clean, 5) Faulty spark plug
-eplace-Drain