When I was rebuilding my boat I wanted to drain the tank. All I did was connect
a hose to the fuel filter "out" and drop it over the side into a gas can on the
driveway. A quick pump on the ball to get it started and it siphoned the tank
down to where the pickup stopped drawing. It went fairly slow but that just
meant I didn't mean to swap out cans as quick. Just keep an eye on them.
You will need a long piece of hose ... but you all carry one on the boat ...
right??
I have enough coiled up in my tool box to get from the tank filler to the
engine with some left over and a new ball, just in case something happens to
the normal fuel system. The only thing worse than running out of fuel is to
have a tank full and not be able to get it to the engine.