Thru hull transducer

[Drumhead]

Looking for some guidance on placement of thru hull transducer. I have a 1987 Mainship DC40. Any thoughts?
Thank you for looking.

 

[mike66]

Mine is located 1/3 back from bow close to centerline, just forward of engine. Albin 40 trawler. I think any accessible area midship will work for you.

 

[Drumhead]

Makes sense!

I was able to find a video online that parallels what you suggested. Thank you for the input. Very much appreciated.

 

[Group9]

We put one in our boat a few months ago and one really good technique we used, is putting the transducer in a bag of water and trying it out on different parts of the hull to make sure there are no sonar unfriendly substances underneath.

 

[Comodave]

Put it where it will fit in front of the engine intakes and any other things sticking down from the hull. You want it in clean, undisturbed water. Also check the angle of the transducer element and the angle of the hull. The angle that the transducer transmits should be close to the deadrise angle of the hull where you are going to mount the transducer. To check locations I use 2 rare earth magnets. I tape one inside the hull where I think I want the transducer and then go under the hull with the second magnet. It will find the first one that is taped inside. If the bottom looks clear from obstructions then where the second magnet is will be where you drill the hull. The magnets save all the measuring and guesswork as to where to drill the hole.

 

[AKDoug]

Yep, bubble protractor to find the right angle on the hull, clear space above (inside) for the wiring and to turn a wrench on the nut, ahead of all discharge ports. For me, that was midship and 12 degrees with an internally angled transducer (no fairing block).

 

[Comodave]

I used a digital angle finder that is designed to measure the angle of the blade on a table saw. The transducer with the angled array is called a tilted attay. They usually come in several angles so you pick the one closest to the deadrise angle of the hull.

 

[koliver]

I have a transom mount TDucer mounted to the inside of a piece of ABS pipe. That pipe is cut to the angle of the hull in a quiet place under an ER floorboard, where it is epoxied in place. A little mineral oil and the TD thinks it is on the transom, can shoot the bottom without interference.