Have a Minn-Kota turbo-pro 512. On frequent occasions the motor keeps running after I release the push button. Talked to Minn-Kota and they had me replace both the mom-con switch and the pushbutton. Still won't shut off all the time. Called Minn- Kota back and they feel the circuit board under the foot petal has a relay sticking. They don't make these circuit boards anymore. Sure would like to find one.