I have used Raymarine for 9 years on outboards, I/O's and inboards. I have had noproblems and they track as well as you could ever want. The early units had a few problems but the last 6 years or so have been excellent. They have a new sx series out now that has all the features at a price you can afford. Also, if you have a single outboard on that Parker, the s1000 is a darn good unit.