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Old 30-08-2017, 11:30   #1
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St4000 Control Head Wanted

Looking for an Autohelm st4000 control head. Mine got hot and is now not sending power to the wheel pilot motor. Good working condition please.
Thanks.
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Old 12-01-2018, 20:32   #2
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Re: St4000 Control Head Wanted

Any luck? Same sad story here..all seems to function on my headunit..just not enuf juice to wheel.
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Old 12-01-2018, 21:14   #3
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Re: St4000 Control Head Wanted

Someone just posted a full st4000 package for $850 on the Facebook “saiboat swap shop” group.
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Old 13-01-2018, 07:06   #4
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Re: St4000 Control Head Wanted

Im hoping even to find an electronics/circuit guru to repair my head unit..its functional except doesnt give enough power to wheel..$850 imo is too much for a 30 year old unit that could crap out at any time..
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Old 13-01-2018, 19:48   #5
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Re: St4000 Control Head Wanted

cdnmurse,

Test wheel motor with 12 volts to wheel in both directions.
Does it turn wheel each way with clutch engaged?
If yes, either wiring from / to head unit or wheel drive motor, or head unit.
Head unit MAY be bad, or have bad connections but is NOT NECESSARILY your problem.
PM me if you wish, I've been there with several fixes.
Electronic tech "retired", yeah right!

http://www.sjsewing.com
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Old 14-01-2018, 19:19   #6
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Re: St4000 Control Head Wanted

Ill try that thanks..Click image for larger version

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Old 14-01-2018, 19:20   #7
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Re: St4000 Control Head Wanted

Seems to work..As i power through head unit the power is there but not suffice to turn wjeel.
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Old 14-01-2018, 20:28   #8
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Re: St4000 Control Head Wanted

There are several complete systems and control heads on ebay. A good place to find parts. I do it all the time for spares.
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Old 15-01-2018, 10:28   #9
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Re: St4000 Control Head Wanted

Does applying 12 volts directly to the wheel without the head unit give you plenty of power to turn the wheel? Reverse the polarity to turn it the other way.
If so, the problem is either wiring to to the motor, or the head unit.
If it's still weak, it's the motor.
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