1. The gauge had been reading fine until I filled it completely–gas was running back out of the filler tube, so I know it was full. Since getting it that full, Ive had the issue with the gauge reading.2. Yes, the 200hp Opti is fuel efficient, but I have been running the boat quite a bit since filling it up (end of April), and at WOT more than once, and the gauge has not moved. It would move previously, and as I ran the boat and burned gas it would drop.3. This is a new rig, purchased this past March 2010, so I guess Ill call service and get a new gauge to install.4. Seriously, I can not see anything thru that peep hole, and my primary color is white this time; we had the peep hole on a Candy Apple Red Puma, and it was the same for my poor old eyes…