Does this transducer mount in the floor of the boat,or on the bottom of the hull?

Hey Joe,
Wow.. where to start.. there are so many things that will cause the issue you are describing.What type of electronics do you have? Does this happen at all speeds? Where is the transducer mounted? I need more info about when it stops reading.
1.Wrong setting on the unit
2 Bad transducer
3 Bad transducer mounting (either inside the hull or outside the hull.)
4. (In hull) Turbulence going under the boat (mine quits reading at about 55 mph @ half trim...the boat is lifting so much it causes air pockets so the transducer loses contact with the water)
5. (Outside hull) Turbulence around the bottom of the boat where the transducer meets the water.
Good luck,, when you get the info.. reply to me..

Hi Mike
The transducer (depending on which one you have) should be mounted to the hull of the boat. If a transom mount, at the back of the boat of course and if a through-hull or in-hull ducer in an area that provides good contact with the water at all times.

You shouldn't mount the transducer on the motor.
I was unable to find a reference anywhere to the Fishmark DE.

-Steve

This is what the manual says:
The StructureScan transducer can be mounted on the transom,
jackplate, step or directly to your boat's hull.
When mounting it directly to the hull, you must purchase a high-
quality, marine grade above- or below-waterline sealant/adhesive
compound.

Many depth finders don't work when the transducer sees a little turbulence. My only suggestion is to try different locations for the transducer, trying to guess where there will be the least turbulence beneath it. This is easy if your transducer is mounted inside the hull and reads through the hull. Not so easy if it is a through-hull mount. Be sure it is mounted correctly to the hull if it is mounted inside the hull.

I’m happy to assist further over the phone at https://www.6ya.com/expert/bill_f6ca18ca1db028ed

Might help to tell us what kind of boat - deep V hull 22 ft.? bass boat with shallow V hull? Some need the transducer closer to the centerline of the vessel while others do better more outboard, Naturally they need to be flush with the hull no matter where they are located. Depending on the transducer, you could also try properly mounting it inside the vessel near the transom. Good new is you are getting good info from it. Cheers Pete

there are two kinds or transducers out there on the market --- some that can be mounted inside the hull and others that need to be mounted on the outside of the hull, the instruction manual should indicate which transducer you have. AND YES the transducer will only work when you are on the water --- the readings on land are no good and it will not work. install it on the boat and then test the unit on the water. BUT if you do want to test the unit before you install it to the boat you can always take the boat out to a lake ( or wherever ' on the water ' ) and mount the transducer to a long dowel or stick and hang it over the edge of the boat and this will work fine for testing.
' fish on and have fun '

c...

Here are your options:

In-hull Mount Transducer (200/50 kHz, 12/45 deg)
010-10327-00

Thru-hull Mount Transducer with Depth and Temperature
010-10194-01

Bronze, Thru-hull Mount Transducer with Depth and Temperature
010-10182-01

Transom Mount with Depth, Temperature and Speed
010-10192-01

Transom Mount with Depth and Temperature (200/50 kHz, 10/40 deg)
010-10272-00

Thru-hull Mount Transducer with Depth (200 kHz, 12 deg)
010-10107-00

It all depends on the type of boat and how you are going to be using the fishfinder. Here is my email: [email protected] if you want to discuss your uses further and if you want to purchase a transducer.

Hello Keneth,
Is The transducer In Side the Hull Or Mounted On The Transom?
If Inside Remove It And Re Fit It Using Epoxy Glue Ensuring No Air Pocket Between transducer And Hull.
If transom Mounted Replace Transducer.
Hope this Helps
Gordy

jmiller,

Sound like your getting turbulence from the hull or your angle is allowing cavitation under the transducer. Look under the hull where the traducer is mounted and look for a part that has no obstruction including saltwater pickups, hull relieves, etc. The other thing to check is to take a strait edge on the bottom of the transducer to ensure the angle is slightly forward than the hull.

Bob

The problem is not so much the flat bottom, although they are prone to this problem. The way the sonic waves have to travel through the water is affected by turbulence, especially by air bubbles and cavitation, and by the transducer actually leaving the water, which happens frequently on flat bottomed boats. The best solution to this is to have the unit mounted through the hull so it is completely flush with the hull surface - often they are mounted with a surface flange on the outside of the hull which although thin still causes cavitation around the transducer at higher speeds. about 14 knots will usually interfere with the accuracy of the readings on most hull shapes - forward looking sonars perform usually better. Another thing to check is that the transducer is actually seating right in the housing, if it is not flush with the flange then you have problems - even half a millimetre is too much. check no muppet has painted the transducer with antifouling paint - that never helps, also check if there is a build up of marine growth on or near the transducer - a smooth hull will always keep your depth working until a higher boat speed. if the transducer is growing stuff itself then gently scrape it off - be really careful not to scratch the surface. There are now available non-sonic depth sounders, especially ulf radio signal devices, but I have heard no good reports about them, last i saw they were very expensive and maybe they experience other problems at high speed. there also have been towed devices available that may suit your needs better, although probably a lot of trouble in shallow waters. If you can borrow a waterproof video camera, you could mount it behind (not too close) the transducer, this would be a pain to do, but it may give you an insight into what part of the hull if any is causing the problem (tie the camera to the top of the boat securely in case the mount fails) Hope this helps, sorry but your dealer is not totally wrong :)