I have a 20' pontoon boat that has a small leak in one of the pontoons. Yes, I plan to fix it after the season but for now would like a way to pump it out. The only access to the inside is via a 3/4" capped hole that I can take off. I have a hand pump to pump it out but it is taking way too long. A bilge pump would be great but it has to be submersed and is too big. Is there any common pump that can draw up a 1/2" tube about 2' and sit on top to pump it out as I have not found one yet. Thanks.