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AP11 Questions

Old 09-10-2016, 08:44 AM
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Default AP11 Questions

I'm thinking of buy a new boat and it comes with a AP11 autopilot, Does anyone have any experience with these or know any info, I googled up and I've seen a couple people having problems, also does anyone know the years that they started to make them and stopped making them thanks
Old 09-10-2016, 08:45 AM
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Also if I want to put in a new autopilot would I need to buy a whole package with pumps and compass etc
Old 09-10-2016, 09:01 AM
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An AP11 should still do a good job. The problem is that there are no spares except for the pump available.

You can keep the pump if upgrading, everything else will have to be replaced.
Old 09-10-2016, 06:44 PM
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We owned our old 1999 model boat from 2002 until early this year. The AP11 in that boat was original to '99, and it was still working flawlessly when we parted ways with the boat this year. Ours wouldn't die. The autopilot and the toilet were the only things left original on that boat.
Old 09-10-2016, 09:31 PM
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I assume you are also using an RF300 Rudder Feedback unit which is also still applicable. If your compass is an NMEA0183 it too is OK
All you need is the NAC3 which will accept the compass which I guess is an RFC35. The NAC3 is more expensive because of the high drive current so it may be cheaper to replace the compass for an NMEA2000 one and go for the NAC1 or 2 versions.
Although the current pilots use VRF based on time for rudder lock to lock and compass correlation, using the RF300 is preferred. It is more accurate and allows for an accurate rudder angle indication. The VRF was only ever meant to be used in applications that could not fit a genuine RF transducer.
Old 09-11-2016, 05:45 AM
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My AP11 from original 1999 install is still running great. Only had to change out the LF 300 once. Solid units.
Old 09-11-2016, 07:02 AM
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Default Ap 11 repairs

Good unit, at least on my boat, once I got it fixed.

Took some time to adjust response settings to stop wandering in beam seas, but once adjusted works just fine

Max marine Electronics in Pompano Breach FL repaired the dead motherboard - very reasonable price They also have quite a few tested spare parts.

Pump motor stopped running gave a few error message a few weeks ago. Read on THT that they often have brush problems. Pulled brush caps off and removed brushes. Blew out
A small amount of carbon dust , sprayed in some contact cleaner. and stretched the brush springs slightly. Now running fine.

replacement brushes are available, if a bit pricey

NOMAD
Old 09-11-2016, 07:12 AM
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Originally Posted by isitstuffed View Post
I assume you are also using an RF300 Rudder Feedback unit which is also still applicable. If your compass is an NMEA0183 it too is OK
All you need is the NAC3 which will accept the compass which I guess is an RFC35. The NAC3 is more expensive because of the high drive current so it may be cheaper to replace the compass for an NMEA2000 one and go for the NAC1 or 2 versions.
Although the current pilots use VRF based on time for rudder lock to lock and compass correlation, using the RF300 is preferred. It is more accurate and allows for an accurate rudder angle indication. The VRF was only ever meant to be used in applications that could not fit a genuine RF transducer.
I would not recommend a compass without rate gyro (like RFC35) with the new autopilots (actually not with the AP24 generation either) since this will strongly degrade the performance.
Old 09-11-2016, 12:52 PM
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Originally Posted by Bluefin Contender View Post
My AP11 from original 1999 install is still running great. Only had to change out the LF 300 once. Solid units.
^ This x2, mine was installed in 2005.
Old 09-11-2016, 01:39 PM
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Thanks for all the replies
Old 09-11-2016, 07:34 PM
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Originally Posted by abbor View Post
I would not recommend a compass without rate gyro (like RFC35) with the new autopilots (actually not with the AP24 generation either) since this will strongly degrade the performance.
Agreed, the AP11 came with RFC35 with the RFC35R Rate offered as an 'option'. He may have one already, and it will work fine if NMEA0183 output is available. But to take advantage he will need the more expensive 50 amp NAC3. The cost difference between the two may enable the NAC2 and a new compass to be cheaper.

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