MY BOW THRUSTER IS STUCK IN THE DOWN POSITION. THE PROXIMITY SENSORS LIGHT UP, BUT NO MOVEMENT. IN FACT THE THRUSTER PROP ALSO IS INOPERATIVE. HOW CAN I RAISE THE UNIT? THE LIFT MOTOR SOUNDS LIKE IT IS STILL WORKING, BUT SLIPING ON THE DRIVE SHAFT? ANY HELP, OR CONSTRUCTIVE COMMENTS WOULD BE APPRECIATED. THE BOTTOM PROXIMITY SENSOR HAS BROKEN ITS STAINLESS STEEL CLAMP. THIS SENSOR HAS AN "H" ON IT. IF I POSITION IT ON THE SHAFT IT THINKS THE THRUSTER IS UP.