Theoretically yes. If the bilge pump does not kick on, you can slowly sink any boat by water in through the engine vents. As water splashes in and collects, the boat will slowly sit lower, allowing a little more water to enter with each wave. Once the vents hit water level, it will enter as a steady flow. At that point, it will sink. But, this will require the pumps not to work and an amount of time for the water to build to enough of a lever to lower the vents to the waterline.