Honda BF50 (5HP), BF5A Outboard Motors Shop Manual 2014, Page 35Get this manual
BF50BF5A FUEL PUMP DELIVERY
Gasoline is flammable and explosive under certain con ditionsDo not smoke or allow flames or sparks near the equipment while draining fuel Always work in wellventilated area Wipe up any spilled gasoline at once1) isconnect the fuel line at the carburetorConnect the fuel tube to container that can be added the fuel to the carburetor2) Start the engine and let fuel flow into container for minute and measure the delivery volumeSpecified delivery volume 300 cc (1,300rpm)