Auto pilot failures on multihulls

[knockabout]

she works well when her left arm aches she changes to the right but we are mono
navico tp 100 from ebay used item had a fault/the belt drive cog spun on the shaft
so the back up system was deployed
cheap on power runs on coffee and muesli bars


unserviceable part has to be sent to approved service centre / so out on the water disassemble /epoxy cog to drive shaft / refit drive belt /reused housing o ring with a film of rubber grease /3 years ago still o.k / won't mention servicing the back up system