The wheel rapidly spins back and forth, even on the lowest response setting, with my new EV-1 and hydraulic linear drive.  When motoring and there is very little load on the helm, a small correction will start the drive pumping back and forth and the wheel spinning back and forth.  If I put my hand on the wheel for a moment to stop the spinning everything is fine for awhile.

This does not happen when the helm is loaded up--when I'm sailing and there is a little bit of pressure on the helm.

The steering system is pretty tight--there is very little play between the wheel and quadrant.  There is a little bit of play, but not a lot, between the drive and the quadrant (maybe 1/8"??)

EV-1 course computer, P70 display, Raymarine rudder sensor and third-party hyrdraulic linear drive.

I don't know if the forum will allow me to attach two short videos--but I'll try.  One is the wheel and you can see I start the spinning back-and-forth by giving the wheel a little turn.  The other is a shot of the drive and quadrant when this is happening.

Views: 397


Reply to This

Replies to This Discussion

What is the ACU being used in the system?  What is the model number of the 3rd party hydraulic linear drive?

I'm using the EV-400 sail and the driver from an older Robertson AP.

Do you have a model number of the Robertson drive?  I need to know information on it to understand the issue.

The markings on the drive are worn off or were painted over but it appears to be a Robertson HLD200L.  

Product listing


I moved the pin that the rudder sensor connects 4 or 5 inches further out on the steering quadrant--further from the rudder post.  This means movement of the rudder produces a larger movement of the rudder indicator than it had previously.  

This seems to have helped a little--the wheel doesn't start the cycling back and forth very often when motoring in a straight line.  But if i put in a course change it starts up again.  

It seems like the rudder sensor picks up a small random movement of the rudder and the drive responds with a correction too quickly.  Then the rudder indicator picks up that overcorrection and moves the rudder back in the other direction and a feedback loops starts.

I also took the wheel off the pedestal while underway and although I still get this behavior, it isn't as bad.  The mass and momentum of the wheel seem to make it worse.

I've checked the steering components carefully (again) and everything is snug and operating correctly. 

Try changing the Response level you have set in the system?  What is the current Response you have set now?

That was the first thing I tried.  It's on leisure.

OK, how about the Rudder Damping number, under MENU>SETUP>AUTOPILOT CALIBRATION>DRIVE SETTINGS.

Hmmm....I haven't seen that setting but it sounds like exactly what I need.  I'll check it out next time I'm on the boat.

You want to make sure you are at the latest version of software, for the system, p70, EV-1 and ACU-100.

It looks like I do not.  My display is 2.12 and the latest is 2.17.  

I'm a little confused about my EV-1--my notes say the software I have is 1.11, but it doesn't appear on the Raymarine website that there is such a version.

At any rate, I have a C series classic MFD so it doesn't look like I can use it to update the software.  So what should I do?

Without a compatible Raymarine MFD your options are;

  • bring the Raymarine electronics components to the Raymarine dealer from whom they were purchased ... recommend contacting the dealer before removing any equipment from the boat
  • hire a certified Raymarine installer to visit the vessel
  • send the Raymarine electronics components to Raymarine's Product Repair Center

Reply to Discussion




  • Add Videos
  • View All


  • Add Photos
  • View All

Latest Activity

Paul Grady updated their profile
May 19
Jim Capron updated their profile
May 12
Russ Lawrence replied to Tiago Menezes's discussion Night mode
"Running an a78---  I have installed V14.  Is there a version that gives us the option of a night color scheme as this time?  Or am I remembering my old Garmin system?"
May 10
Ori updated their profile
May 9
kenneth hiebert left a comment for kenneth hiebert
"After 4 years of owning Raymarine products I finally decided to join the forum. Although some of the posts are well beyond my technical understanding ,there are many layman's posts.I have also found it much easier to wire an airplane than my…"
May 8
kenneth hiebert updated their profile
May 8
EDSEL TELLIS replied to James Varner's discussion 45 series antenna with Directv
"looking for a replacement HD acu R08255 for a stv 45 antenna with a new control board R08142. is it still available and will it work."
May 2
Richard Emerson replied to Richard Emerson's discussion ST70 screen goes blank
"The light dawns. The solution was to replace the unit. At this point (2018) I'm not sure that Raymarine can still repair the unit. We were in the Exumas when the unit failed. Ultimately, I bought a replacement (successor to the ST70 - I forget…"
Apr 25
Mark Jones replied to Richard Emerson's discussion ST70 screen goes blank
"Thanks Richard, it's called Google and it searches for things on the internet.  Your problem is the same as my problem and I'd like a reply from Raymarine before they close it out because I'd like my unit to get repaired."
Apr 25
Steven Andskar updated their profile
Apr 25
Richard Emerson replied to Richard Emerson's discussion ST70 screen goes blank
"Um, I'm not sure how this popped up. The problem occurred five years ago (2013). The ticket can be closed."
Apr 24
Mark Jones replied to Richard Emerson's discussion ST70 screen goes blank
"Do we need an RMA for this?  If so, how do we get one?  My unit has been doing this for 2 years and our last calls to support didn't mention anything about this."
Apr 24
NOAM REJMAN replied to Louis Viau's discussion E80 classic radome compatibility
"hi there i have E80 & RD418D that i got from a freind swore that the system work called support yesterday asking the same question: is RD418D is compatible with E80 v5.69?  Answer was not compatible. i read on here that it is…"
Apr 17
Geoff MacDonald updated their profile
Apr 16
Germain Bélanger updated their profile
Apr 16
Colin Bondy updated their profile
Apr 8

© 2018   Created by Moderator - Raymarine, US.   Powered by

Badges  |  Report an Issue  |  Terms of Service