reply to the last two...
Thanks Jim, but I'm looking for support on the 4000, not the ST4000. Mine is the old black case Autohelm, non-seatalk (ST) pilot without the LCD display, etc. Belive me, I've been all over the Raymarine website - you'd never know that any of the pre-ST stuff ever existed.Bill, I have a manual. I am interested in other technical info, like interfacing with a GPS, schematics, discussions or explanaitons of the steering algorythms, upgrades and fixes, technical notes, etc., etc. My most recent experience with Raymarine tech support was hardly fulfilling. See my post in the discussion archives. I WAS able to repair the unit myself. By the way, why isnt the output short-circuit protected?So, if there is any info available that will help inform me, and extend the useful life of my gear, I would appreciate access to it. Regards,jv