Front bilge pump

[johnboyy7]

I turn on and it pumps but not all the water. It stops with like 1.5 inch or so left. By it no pumping all the way out, when I'm towing home and hit the breaks , the water comes forward and out the drain in the bow thus getting the carpet wet and aggrivating the owner. Thoughts?

[DanielC]

The boat should have two working bilge pumps, the second one in the back, behind the engine. Check to make sure the aft bilge pump works.
If you drive the boat slowly, about ideal wake making speed, or wake surf speed, the bow of the boat is pitched high, all the bilge water runs to the back, and turning your bilge pumps off and then back on will pump most of the water out of the bilge, if you stay at the slow speed until the bilge quits pumping water.
Another option is when you are sitting on the boat ramp, just out of the water, remove the stern plug, and let the water drain out.
Remember to put the plug back in before you launch.

[johnboyy7]

Right understand that. I noticed the water in the by the belly ballast after I pulled the boat out. With your thought I jacked up the front of the boat to try to push the water to the back but was unsucessful. The question is.... Why does my front bilge pump shut off before it is empty? I thought they were either on or off. This one acts like it's coordinated with a level switch.

[steve-o]

Bilge pumps usually leave an inch or 2 of water. They can't stay primed below that. I leave my plug out unless I'm in the water. Helps keep the bilge dry.

[DanielC]

The bilge pump does not have a float. It does have a way of sensing the speed the pump is turning. If the pump is pumping water, it is working against a load, and turns slower, and stays on. When it starts to cavitate, or suck air, it speeds up, and then that signals the pump to shut off. Any water in the bilge pump hose runs back down into the bilge. In short, the bilge pumps will never get all the water out of the boat.
There might be a passage for water fron the belly tank area to the back of the boat that is plugged up. This would prevent water by the belly tank from flowing aft.