Shout out to Richard at Schermerhorn Marina. in This Old Boat Posted August 30 · Edited August 30 by lrg355 Installed a new Motor Guide XI3 on my Sea Nymph GLS175 last year. Use it mainly for autopilot on spring browns. Had a few gremlins in the gps function from the start. Was notified by MotorGuide (which is Mercury) that there was a program update available. They sent a "dongle" which is the program that is on a memory board that plugs into the nema cable. Followed instructions, downloaded program, tried to calibrate gps as per instructions, nothing worked. Motor was useless. Called service line, they said take it to a servicing dealer. Called dealers from Oneida to 1000 islands, nobody wanted to look at it even though it was warranty. One recommended Schermerhorn near Alexandria bay. Called them, they said bring it in. Took the boat up since it was hard mounted. Richard was the MotorGuide and MinnKota Technician. He had same problem, couldn't calibrate. Reloaded program, same problem. Richard contacted factory, they said put in new gps module and control board. Would be a month for the parts. About a week later parts arrived. Took boat back, in about an hour new parts installed, calibrated and good. Richard was very quick, courteous and knowledgeable. One signiture and I was good.