I HAVE A MERC 470 OUTDRIVE. THE TRIM IS PULLING UP FINE BUT WILL NOT GO DOWN. I'VE ADJUSDED THE REVERSE INTERLOCK SWITCH,BY-PASSED IT BY PUTTING IN A DIFFERENT PUMP. BLED THE SYSTEM. THE TRIM WILL ON OCCASION PUSH DOWN BUT STILL TRAILS UP WHEN IN REVERSE. THIS PROB. HAPPENED ALL OF A SUDDEN. CAN...
