2012 Z521 with a Yamaha 250 SHO. Trim gauge will not show all the way down when the motor is down. Started out at showing down at about an 1/8 yesterday and kept getting worse as the day went on. By the end of the derby yesterday, the motor was all the way down (or appeared to be) but the gauge was registering in the middle between down and up. Not sure how to diagnose or what to check. Any ideas?