nasa duet

[nac]

have recently bought and fitted a duet, and lo and behold ,zero reading. am not the best at electrics but followed the instructions and no joy. anyone else have this problem. would be glad of any advice.
nac

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[jimbouy]

Not much info to go on.

But if both depth and speed are showing a zero on the display you at least know the juice is getting thru.

So a problem with the two transponders needs to be your next port of call.

Do you have them plugged in correctly or might you have crossed the two over.

Are you actually in the water and moving obvious i know.


<hr width=100% size=1> "It is a pleasure to give advice, humiliating to need it, normal to ignore it"

 

[KeithH]

By coincidence, I fiited a Nasa Duet on Saturday too. Fitting went as per instructions, and depth transducer worked immediately on power up. It started up in metres mode. Incidentally, I found that it was easy to test the function of the speed log by spinning the wheel - the display responds quite quickly, even though the speed of the wheel was changing. There is a delay in displaying the reading, presumably due to some sort of time constant in the electronics -but at least it will show if the display is functioning.

Only snag I found is that the new speed transducer is a different diameter to the old Navico one - so I have a job for the winter, to fit the new skin fitting ... unless someone has any ideas on how to adapt the new transducer to a Navico skin fitting.

KeithH

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[gjeffery]

Same problem. Depth works fine but speed reads a constant zero. Still waiting, after a week, for NASA to reply to my e-mail asking for advice about testing.

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[Cantata]

On the boat I just sold, I had bought a NASA speed to replace an old Navico, but never fitted it. I discovered that the NASA skin fitting was a snug fit inside the Navico one, so I'd planned to grind the old one off top and bottom and fit the new inside it with lots of sealant.

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[gjeffery]

I think you would be restricted to bedding NASA skin fitting in silicone. It was a big disappointment to me that having bought the NASA instrument, I found that I should not bed the through hull fitting in Sikaflex. Apparantly, Sikaflex might dergrade the plastic og the NASA fitting.

If anyone knows of an alternative, and preferably bronze, through hull fitting that will take the NASA paddle wheel transducer, I would be interested.

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[milltech]

What email did you use? Try nasamarine@aol.com


<hr width=100% size=1>John
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