I searched and found some complaints about the Jeffa compact drive unit manufactured before ~2008. It seems like they had a bad seal on them that allowed corrosion
, and they later changed the design of this seal. I found no complaints about them after this period. Also, all of the complaints seemed to be from owners of a particular boat model, where this drive was mounted in a wet area.
is a rebranded Jefa compact drive. Garmin
uses the Jefa linear drive
on their smaller systems. Raymarine
uses their own linear drive
, but it is probably made by someone else and OEM'ed solely to Raymarine.
I have found most autopilot
failures to involve the mounting system - on both the quadrant and fixed ends. Second most involving electrical
supply. These could be considered drive-related, but the drive itself is usually not the problem. Like you, I find the electronic components pretty much trouble free barring catastrophic events