NASA Sounders what oil

[warwicksail]

Hi
Does anyone know what oil I can put in the tranducer of my NASA Sounder

Cheers

 

[Alcyone]

Hi,

I have a Nasa clipper sounder, with a circular transducer fitted in hull in our boat. I was told to top up the oil with a mineral oil, which I bought from Halfords, and it works fine. When I fitted my Garmin GPS to the boat, it had its own transducer, so I cousntructed a little box out of an old uPVC windowsill fragment and stuck that to the hull. Filled that with the same oil and the picture is perfect on that too.

Can't say it's officially recommended by Nasa, but it works.

May be some help here too:

http://www.nasamarine.com/downloads/downloads.html

 

[Poignard]

Castor oil

 

[warwicksail]

Thanks guys, will give it ago in the morning /forums/images/graemlins/smile.gif

 

[damo]

Mineral oil, castor oil, olive oil, water - plenty of things seem to work so long as they can make good contact with the hull and exclude air bubbles.

Loads of threads on pbo, along with those about sticking down external transducers with silicone sealant, which I and plenty of others have done /forums/images/graemlins/smile.gif

 

[graham]

I used cooking oil on the last boat worked fine.On this boat I have bonded it directly onto the inside of the hull with silicon.

 

[Csail]

Any oil works but i found silicone sealant to the hull was best.

 

[rogerdog]

another vote for silicon sealant - just careful that you don't trap any air bubbles - but works very well and can be removed easily for any reason - just don't epoxy it to the hull /forums/images/graemlins/blush.gif I speak from experience as only one was still there when i sold her !

If tube already fitted any oil - I prefer mineral oil - simply as veg oil in a few years time starts to 'set' a bit