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hornby sailor 21-01-2014 16:24

autohelm st4000 phantom dodge
my st 4000 will occasionally veer to port about 20 degrees and then correct back to it's heading. a friend gave me another unit that had been replaced because it would turn 360 on its own. what is going on? its not anything being moved near the flux compass.

senormechanico 21-01-2014 17:32

Re: autohelm st4000 phantom dodge
Mine was caused by 8 or 9 bad solder connections to the four 3 Mosfet transistors in the head unit.
Easy solder fix.

giant 21-01-2014 17:52

Re: autohelm st4000 phantom dodge
Maybe try re calibrate your flux-gate compass.

Requires some button pressing and a 360 degree circle... see your manual.

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