[CA] [CA11] Replacement of S1G with a Evolution

[morowsky]

I have broken this post out of a previous thread I had (Raymarine forum / Raymarine Forums / Multifunction Displays / [CA11] Upgrades to my 2006 Four Winns ) because it only deals with the autopilot, and is independent of the replacement of the MFD.

To start, my boat is on the hard, shrink wrapped with no access to the engine compartment where the hydrolic pump is. The electronics and Autopilot are part of the original equipment (2006 Four Winns 348) installed by the manufacturer.

Also, in the previous thread, the Moderator identified the existing Autopilot as probably a S1G, with which I concur. The suggestion was that an ACU-150 could be installed as a repllacement for the S1G IF the pump is a TYPE 1.


Reviewing the wiring diagrams for the boat, shows that the circuit breaker for the current AP is a 10 Amp, with 14AWG wiring. Installation instructions for the S1G specifies a 20 Amp circuit breaker with 14AWG wiring. As I understand it, this supplies power to both the S1G module and the pump, with the pump being the largest draw of power.

A Type 1 pump can draw up to 12 Amps, suggesting that the current pump migt be a smaller Type 0.5 pump which draws 7Amps.


Questions:

Q1: Is this a correct assumption?
Q2: Can/should I install a ACU-100 instead of a ACU-150. (potential cost savings)
Q3: If in fact the pump is a Type 0.5, is there harm/downsides in having a ACU-150 driving it?
Q4: If I install an ACU-150, can I continue with the 10Amp CB, or should I upgrade to the 20Amp. This CB has never tripped and the AP has always worked properly.
Q5: If I wait until I open the boat (nice weather and no snow) to purchase the equipment, how do I identify the type of pump. Remember this is 2006 era equipment. I understand that this is probably the best course. It is just a matter of timing.

Thank you in advance for all your help.