Honda BF50 (5HP) BF5A Outboard Motors Shop Manual., Page 33Get this manual
a FUEL PUMP DELIVERY is flammable and explosive undir'certainconditionsDo not smoke or allow flames or sparks near the equipment while draining fuelAlways work in well-ventilated areaWipe up any spilled gasoline at once
1) Disconnect the fuel line at the carburetorConnect the fuel tube to container can be added the fuel the carburetor2) Start the engine and fuel flow into container for minute
and measure the delivery volumeSpecified delivery volume