I have 42 commander and installed a Raymarine Evolution autopilot with a rotary drive unit which attaches to the wheel hub sprocket behind the dash with a chain. Install was easy and setup seemed easy but yet it doesn’t work. I place the binnacle in the wall just aft of the side entry salon door which seemed ideal. Checking diagnostics I am getting a 14* variation which may be my problem. Online searches promote moving binnacle aft but I have the 2 gas tanks and water holding tank back there that I think would also throw magnetic disturbance. Any suggestions for a good spot to put it? I have no idea what is causing the problem in the current location... it seemed ideal.
thx for any suggestions!!
In my 381 the original Benmar autopilot binnacle is located low in the bow under the forward bunks, but far enough aft and down to (hopefully) not be effected by the anchor chain. The general rule of thumb is on center, as low as possible but away from large ferrous objects.
Understood. A place with that definition is proving difficult to find!