Join Date: Oct 2009
Location: Swarthmore, PA
Thanked 139 Times in 128 Posts
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Need help diagnosing Raymarine ST4000+ Autopilot
My autopilot just went out - Raymarine ST4000+ wheel pilot with black wheel ring. Setting the clutch engages the wheel (can't turn manually with it engaged), like it should. And when I hit "auto" and +10 I can hear the motor whirring to turn right, but the wheel does not move. It keeps whirring every few seconds because the boat's not turning, as you would expect it to.
AP worked perfectly for survey this week, and worked for a couple hours this morning. Then it lost ability to turn left, but would turn right. A minute or so later it lost ability to turn either way. Obviously we're hand steering until we finish delivery to our new home port.
I suspect that there's a wheel, gear, or belt loose inside the wheel ring, and just needs tightening up. But it's puzzling that the clutch still grabs the wheel so well.
I'm just looking for some advice how to take it apart, and what to look for once inside.
I have the same autopilot on my other boat, but a lighter duty (gray) wheel ring mechanism for a smaller boat. But I've never had to open it up and look inside, so this is new territory for me.
Thanks for any suggestions!
Rick S., Swarthmore, PA
USCG Certified Captain, OUPV and 50 Ton Master
ASA Certified 101/103/104/105/106
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2001 Catalina 34MkII Tall Rig Wing Keel Breakin' Away, Universal Diesel M35B, Mantus 35 lb. anchor, sailing out of Rock Hall Landing Marina