"HI, I HAVE A MARINER 175EFI, 1996 MODEL.WHEN GETTING UP ON PLANE OR LOADING ON THE TRAILER, THE MOTOR WILL "JERK" EVERY FEW SECONDS. AFTER THE BOAT IS ON THE PAD IT RUNS FINE. I DIS-ASSEMBLED THE LOWER UNIT COMPLETELY ONLY TO FIND THE UPPER BEARING ON THE DRIVE SHAFT WAS VERY LOOSE (LOTS OF...