Datamarine 5000 masthead unit

Feb 9, 2015
11
Ericson E-34 Lk Champlain
The masthead speed sensor on my DM 5000 failed last summer and I sent it to DMI Marine for repair after I hauled for the winter. It was returned in November, and I checked the box to be sure it was inside and put it away for a springtime installation. Jump ahead to this past weekend, spring is here and I am ready to go up the mast. Removing the unit from the box I discover that both the wind speed sensor and the API sensor are not fastened to the housing and are covered with the damping oil. It is not the same unit as I sent them, bare aluminum housing and arm instead of black anodized finish.

When contacted by email DMI responded too bad... so sad, too late to make claim to UPS for shipping damage. There was no damage to the box and the unit was tightly packed in peanuts to prevent movement.

DMI did offer to put the unit back together, charging me 50% of $250 plus shipping both ways, another $50. This seems unreasonable since the main parts should all be new. My previous dealings with DMI had been good.

Any thoughts or prior experiences with DMI Marine?

Masthead inst. broken 3A.JPG
 

jviss

.
Feb 5, 2004
7,089
Tartan 3800 20 Westport, MA
That's unfortunate. Datamarine was a great company for this stuff in 1980 or so, but unfortunately has not changed with the times. I suspect they are a "boutique," and just surviving on maintenance and parts that they have in stock. A new masthead unit is $750 - and, "limited quantities." For what it's worth, my former, "legacy" system, Signet Marine, sells theirs for $675. On the other hand, Raymarine's can be had for under $300, Simrad/B&G is about $500. But, the B&G unit is NMEA 2000, a more modern interface. What I'm trying to say is that it may be time to modernize.
 
Feb 9, 2015
11
Ericson E-34 Lk Champlain
What I'm trying to say is that it may be time to modernize.
jviss - I agree, 100%... except that I am getting to be very, very long of tooth and decided it was worth investing in the repair to maintain existing boat value. I couldn't expect to get my money back from a complete new instrument package. The DM 5000 is an integrated system - speed, depth, & wind speed and AWI.

I since posting I have realized that the 1/2 price was of a complete rebuild, and was equal to what I had paid originally. When contacted by phone DMI agreed to do the job for $110, not the $250 quoted. He insisted that he returned my unit which is BS.
 

jviss

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Feb 5, 2004
7,089
Tartan 3800 20 Westport, MA
I understand. You are stuck with them if you want to continue using it, and it seems the only solution is more money.
 

BJVans

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Jun 6, 2018
1
Islander 36 Delta
You might check out the static ultrasonic wind sensor CV7. My Datamarine masthead sensor unit was missing completely. I received the CV7-C made by lcjcapteurs from fugawi.com yesterday. They have many versions compatible with most display units. I plugged it into my Datamarine Corinthian CW360 Wind Display NMEA 0183 inputs today and it just worked. I haven’t found a manual for my display yet and haven’t been out to test wind speeds but direction seems good and they talk to each other out of the box.
 
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Nov 9, 2017
4
hunter all 007 port washington, ny
Would anyone by any chance have tried to maintain a Datamarine masthead unit themselves ? Would anyone have pictures of the inner guts ?
I have been told that it is not too difficult. I think that mine is just too low because full of seagull gunk and needs some oil.
 
Jul 1, 1998
3,062
Hunter Legend 35 Poulsbo/Semiahmoo WA
The masthead speed sensor on my DM 5000 failed last summer and I sent it to DMI Marine for repair after I hauled for the winter. It was returned in November, and I checked the box to be sure it was inside and put it away for a springtime installation. Jump ahead to this past weekend, spring is here and I am ready to go up the mast. Removing the unit from the box I discover that both the wind speed sensor and the API sensor are not fastened to the housing and are covered with the damping oil. It is not the same unit as I sent them, bare aluminum housing and arm instead of black anodized finish.
So it isn't just that it wasn't put back together, it is a different unit from your original.
Question: when you "checked the box to be sure it was inside", I don't understand, if it was silver wouldn't that have been noticeable? And "in pieces"? Geze, what a mistake! So much for being trusting.

When contacted by email DMI responded too bad... so sad, too late to make claim to UPS for shipping damage. There was no damage to the box and the unit was tightly packed in peanuts to prevent movement.
So, apparently the unit was switched and another customer got yours. And either the other customer didn't say anything or DMI doesn't want to admit there was a problem. Bummer. Besides, UPS would probably not support a claim for the shipping of the wrong item under the guise of "shipping damage". It is clearly a DMI screw-up. "So sad" they make a reply like that. Not good.

DMI did offer to put the unit back together, charging me 50% of $250 plus shipping both ways, another $50. This seems unreasonable since the main parts should all be new.
Agree, it is unreasonable. Trying to do anything about it would have been difficult even back when you received it without some kind of proof of what was sent originally, and that would've been difficult. I don't think there is a serial number on that part. Given the time that has passed it will be, in Navy terms, "pushing a rope". They're on to new jobs and don't want to be bothered with dealing with an old one they've already been paid for.

Any thoughts or prior experiences with DMI Marine?
Thoughts are above, prior experience? Had very little. Also have the Link 5000 since 1988 and it has worked well. Did have a problem years ago with the wind sensor but that was a long time ago and don't remember what it was other than some kind of wiring problem. At the time they seemed, meh, okay. Didn't want to talk much on the phone. In the meantime I picked up a few parts to keep as spares. Otherwise, the Datamarine 5000 is, in my opinion, a really, really good unit.

The unit has never discolored like so many other brands have and looks nearly as fresh as new. EXCELLENT! Has held up, has a lot of capability, and was way ahead of its time. The one single thing I would like about a newer system is the elimination of the paddlewheel speed transducer. There is a lot of debris in the water, both sticks, eel grass, and algae, and it can mess up the paddlewheel. An inboard unit would be nice to have. Would like a remote wind speed indicator to have below deck in the aft cabin but never got one. The remote nav station is nice but to get out of a warm bunk to see what is happening isn't what I like to do.

I do have a *.pdf copy of the original Link 5000 manual if you need one.
Helm - doesn't look 30 years old, partly because it is covered when not in use.
Edit: the thumbnail was too small and the full image really large, so went with it.
Datamarine at helm.JPG
 
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jviss

.
Feb 5, 2004
7,089
Tartan 3800 20 Westport, MA
I wonder how many people in the world need a new masthead unit for a DataMarine wind instrument, and any other old and unsupported wind instruments?

What you need if you want to keep these alive is to be a nerd, or know a nerd. I've been contemplating a project to take a very inexpensive but very robust wind direction and speed sensor and develop a microcontroller-based interface that produces the signals the on-board instrument needs. Speed is easy, the challenge is producing the synchro signals, but this has been done.

What would you pay for a brand-new wind vane that works with your DMI instruments?
 
Jan 19, 2010
1,279
Catalina 34 Casco Bay
When we first looked at our boat, the DMI pod was off for refurb. It was identical to the one pictured above. The unit was install for the acceptance cruise. It continued to function but with indications that it was prone to a repeat failure. By season's end it had given up the ghost again. I decided there were probably several reasons that DMI went out of business and that I was NOT going to invest any money in a defunct system. So.... RayMarine replaced everything ...
 
Dec 15, 2020
1
CAL 28-2 city island
Hi

do you still have your old unit or did you toss it? I would be interested in purchasing the console if you do. Just purchase a Cal 28-2 with the brain and everything installed just no console. Trying to get away with some instruments until I invest in replacing them.

Thanks!
 
Jan 19, 2010
1,279
Catalina 34 Casco Bay
Hi

do you still have your old unit or did you toss it? I would be interested in purchasing the console if you do. Just purchase a Cal 28-2 with the brain and everything installed just no console. Trying to get away with some instruments until I invest in replacing them.

Thanks!
Had I only known... I held onto it for a few years. This spring I moved and removed it our of my way several times... finally figured it needed a new home..sorry