Home Port; on the Delaware River at Fox Grove Marina Essington PA.

Nautech Autohelm MK II tiller pilot

Nautech Autohelm MK II rebuilt and repaired winter 2011-12 and works well within limits of about
15 degs port/starboard deviation.

The manual for Autohelm 800 while not the same as the MK II shares most features with the xception that the 800 has a feature to adjust for rough conditions.

October 2017
Compass drum mounting screw housing broken, drum mount twisted. Probably jammed in place due to drum tilt, resulting in spring stretched.
Rebuild including fabricating new drum mount.

October 2017
Nautech Autohelm MK II tiller pilot
Compass drum mounting screw housing broken, drum mount twisted. Probably jammed in place due to drum tilt, resulting in spring stretched.
Rebuild including fabricating new drum mount.

Upon further examination of the interior of the autohelm casing there is evidence of the spring rubbing against the casing near the compass drum, depositing scrapings from the casing on the spring.
The question is now did the drum mount failure cause the spring to scrape against the casing or did the spring jamb against the casing and cause the drum mount to fail?

Longer wire cable and shorter spring?

New spring for cable tension
Epoxy for drum mount rebuils

Epoxy at drum mount, to be shaped after 24 hr set.


  1. I have a Nautech Autohelm MKII that was apparently connected up with reverse polarity & now it doesn't work. Do you think there is any hope for it? Glen

  2. The piston and piston coil should still work, however the circuit board may be damaged. This old tech, so visually check the circuit board connections for continuity or discoloring. reconnect to a 12 volt power source (cigarette lighter socket) it will probably still work if the board is not damaged.
    If damaged and you want to repair, find an older repair technician or someone who builds ham radio systems. A new tiller pilot would probably be a wiser investment and provide better functionality.

    I only use this one because it still works, if it were to die I would not spend much time on repairing.

  3. July 2017 the tiller pilot may have finally died. I will take the thing apart this winter when I have time and maybe there will be a resurrection. Hand on the tiller and tiller lock for the rest of this season.



Ulladh pronounced "ul-la" (null lad).

Uladh the gaelic spelling for the territory of the U-Nail chieftains in the ancient Irish province of Ulster (English/Norse), originally the counties of Down and Antrim, but now including Derry, Armagh, Tyrone, Fermanagh, Donegal, Cavan and Monaghan, also referred to as Ulidia (Greek/Roman),.

Uladh was the home of a pre-celtic, cruithne (crew-en-ya) pictish tribe, who may have been descendants of prehistoric tribes indigenous to the British Isles since the retreat of the last ice age.

Archeological finds date first inhabitants to about 6,000 BC and trade goods from Rathlin Island, County Antrim off the northeast coast of Ireland made from porcellanite stone appearing in Egypt and Crete by 2,500 BC.

The early tribes of Ireland where displaced by later waves of migrants from mainland Europe; about 1700 BC by bronze age tribes, celtic tribes about 500 BC, and in the past two millenia; Roman trading posts, Viking settlements, English plantations... and in the 21st century a welcome increasing diversity from the European Union and the world.

SV Ulladh (for vhf clarity I use "sailing vessel ul-la") is named for the territory of the first peoples to settle in Ireland after the retreat of the last ice age.


Since 1949 Fisksatra Varv in the coastal town of Fisksatra Sweden, built fiberglass boats from dinghies to a 300 ton minesweeper for the Swedish Navy.

The Havsfidra 20's were built between 1968 and the late 1970's to Swedish Navy and Lloyd's certification standards.

The Havsfidra 20 and a larger version the Storfidra 26 where sold in the United States by Continental Yachts and Trawler Agency of Atlantic City NJ.

Havsfidra; sea-feather?
(fidra; to touch or tickle with a feather -Icelandic-English Dictionary, Clarendon Press 1874)