Check for a metal tag normally near the rear of the engine where it mates to the bell housing. Often times the # on the valve cover is not the correct one. But being a 3.7/185hp it has to be a mid 80's boat.
I don't recall a phn call or message from you at all. If I had I would of recommended you call Barrett's for any known shift problems with that particular engine and gone from there.
Normally it's the relay itself that's bad, there are two relays one for up & one for the down circuit. Switch them around & see if the problem goes to the down side.
That is the difference with US and European standard, the Brown and Blue are the colors used there. Hook the Red to Motor A and Black to Motor B to start, then during dockside check make sure the autopilot moves the rudder in the correct direction Port and Starboard, if they move in opposite direction, switch the Motor wires.
near shore east http://weather.noaa.gov/cgi-bin/fmtbltn.pl?file=forecasts/marine/near_shore/lo/loz044.txt
near shore west http://weather.noaa.gov/cgi-bin/fmtbltn.pl?file=forecasts/marine/near_shore/lo/loz043.txt
off shore http://weather.noaa.gov/pub/data/raw/fz/fzus61.kbuf.glf.lo.txt
Pair of older Proo's large spool riggers > 5' booms (adjustable) > Dual rod holders > Swivel bases
I don't know much about them except they run ok testing them on the bench & I replaced the power leads. Buy the pair as is for $150.00 picked up > no shipping.