A question for all you experienced boaters out there.... I've taken my new 06 gulfstream out maybe three times since taking delivery last week, and during the last outing the Yamaha digital speedometer froze at 33mph. I tried turning off the motors, and then on, but its still frozen...now it shows 27mph even with the boat in neutral. Any ideas if this is something simple I can fix/tinker with, or do I already need to lay out $$ for a pro to repair this ??? Thanks in advance for the input.