outboard fuel pump strength
I don''t think pump is very strong but that''s why there''s a bulb in an outboard fuel line. My 88 HP Johnson works fine from a belly tank on a runabout where tank is about 2.5 ft lower than motor. I think once line is filled with bulb it doesn''t require much to keep flowing. 40 Gallons seems like a lot of fuel, wouldn''t that be an awful lot of hours of run time on a 10 hp engine ?