While sailing in a gentle downwind situation I noticed a slight knocking sound coming from the drive unit of my Autohelm
ST7000. The sound had a "boing" quality to it and at first I wondered if it could be hitting a fender
buried in the lazarette so I cleared everything out of both lazarettes and watched it. The unit was moving in quick, 1-2mm increments, making minor course corrections in both directions. Some previous postings on this site suggested a hydraulic issue and suggest checking the resevoir and bleeding the unit. That discussion, however, pertained to a cat and I am not clear if the same thoughts apply to my 36' boat. I have to travel to get to the boat and I would like to be prepared to go through a trouble-shooting list next time I am there. Any suggestions?