The dealer installed a Shurflo Bait Sentry™ 800gph pump.
This is a magnetic drive bait pump. In a magnetic drive bait pump, the impeller and motor are disconnected. The impeller has embedded magnets, and sits inside the intake chamber. The motor sits in a separate sealed chamber, and has magnets attached to the shaft. When the motor spins, the magnets on the motor shaft cause the magnets in the impeller to move with it.
There are two major advantages to a magnetic drive:
- If something causes the impeller to jam, the motor can continue to spin without damage or blowing a fuse
- In a fixed impeller system, there is a seal on the motor shaft which keeps water from getting into the motor. This seal is a common cause for bait pump failure, especially in older motors. In a magnetic drive, the motor and impeller are sealed off from each other, so there is no way for water to enter the motor.