[C320-list] Issues with ST4000+ Autopilot

[Dennis Cookson]

John, check that the ST4000 controller is showing the correct position of the rudder at the bottom of the display, adjusting as you turn the wheel. If not, check the wiring from the rudder reference unit (position indicator) to the SmartPilot unit in the aft lazarette.

Your vessel was built at the same time as ours and we likely have the same system!  I am currently relocating my rudder reference device as it was never installed properly and only worked in light winds.

Dennis Cookson
‘Catalina’ 0577



> On 14 Jul 2024, at 18:32, John Stetson via C320-list <c320-list at lists.catalina320.com> wrote:
> 
> Our Raymarine ST4000+ Autopilot system is original, installed in 1999.
> When activating the AUTO mode, the helm goes hard to port.  We have
> verified the Dealer settings and recalibrated, including successfully
> turning the boat to swing the compass.  Intermittently, the autopilot will
> work correctly and then, unpredictably, initiate the same turn on its own.
> We have confirmed that there are no ferrous metals within 0.8 m of the
> fluxgate compass.  Would appreciate any words of wisdom short of upgrading
> to the Evolution EV-100 Wheel Sail Autopilot.
> 
> 
> John Stetson
> Morning Star...Again
> Hull 578
> 1999