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Jonflinch

Having similar problems with a ST6001 autopilot. Smartpilot # is E12120
Just acquired a 2005 Four Winns 348 with a C80
I did a factor reset and updated the software to the lastest version
Changed the battery in the GPS 125, it was completely dead.
While doing the sea trial my variance showed 15, then 24, then 29 which is to high
While running in circles the cog and the heading seam to change normally as the boat turns however they are usually different.
I have checked the ohms on the flux gate, the 4 ohm ones are 5 ohms, the 8 ohm ones are at 8.
checked all connections on everything, all good
verified no metal around the flux gate compass, looks like it has been changed already, found the old wiring going to the old flux gate but can't find it in the boat but is disconnected.
The heading sometimes is the same as cog but most of time it isn't close.
The icon for the boat is pointing one way but the boat is actually moving another.
Sometimes the screen is upside down because the heading is opposite of the way the boat is headed.
If i turn off the power to the auto pilot the C80 appears to work correctly.
However then the radar overlay does not work.
I am thinking the course computer is the problem, do you agree?
Is there a test for the course computer?
Since none of the old works with the new what would I need to upgrade?
I have checked with a couple of the local Ray Marine dealers with no success.