It is not necessary to replace your whole electronics
package. Although you may be tempted when you see what a new one can do
There is likely also no reason to replace the ram - carry a spare set of seals
for it, and learn how to replace them. Hydraulics are incredibly robust and reliable, provided they are treated with a bit of respect.
The pumps can, and do, fail quite a bit more often, So, if I were you, and were not about to re-do all the electronics
, I'd get a set of Hydraulic seals
, a spare pump, a spare set of brushes
and bearings, solenoid, a spare AP computer, controller, rudder
sensor and heading sensor. Total cost for this gear
for a B&G triton system would be somewhere around $4500 USD. It can interface to your existing gear
via NMEA0183 or NMEA2000, whatever is easier for your install.
Of course you can continue to add spares list and still not have something you end up needing. Not really practical to carry a spare boat! This is where lateral thinking and ingenuity can get you home. IMO part of the attraction of the cruising life.
All that being said, I once hand steered for about 1000 NM due to a failed AP computer :-( (well, sheets
and bungies, but you still had to watch it all the time)
Send me a PM if you'd like me to do a real quote, rather than an estimate. I ship stuff everywhere.