pvc pipe under fuel tank as a drain...'82 V20 Fisherman

[SkunkBoat]

you have to get suction on the transom end (under the battery on mine). Pain in the neck, and shoulder, and everything else, to reach. I've used a manual bilge pump and also had luck just sticking a finger in and pulling out quickly several times(waiting for the rude comments...). it'll come a gushing...Then shove the hose nozzle in and spray backwards in the pipe for good luck.