Transducer fitment advice ???

[disorderly]

I have had a problem ever since I fitted my transducer ...
Its for my Furuno sounder and I think it's an Airmar..
The transducer is square shaped with a straight wedge shaped front on it and the problem is that it does not read at speed (over 10-12 knots)and also tends to throw up a rooster tail of water behind it.
What I would like to do is to use some type of product to fill the maybe 5mm gap between the ducer and the bottom edge of the hull in the hope of eliminating these problems.

Just wondering what may be best to use ???.

Scott

[Spaniard_King]

Scott,

put a couple of pics up.. give ua a look .. of the transducer.. not the engine

[disorderly]

I will have too get some better photo's tomorrow Garry....these were the only 2 that came out OK.

[Local_Guy]

looks like it's sitting way too high... you gotta lower that thing into the water... give it atleast 2cm.

my opinion.

[Pridey]

Yeah mate, get it submerged. About 20mm is good. Also angled straight. as long as its not behind an angle on the transome or a corrigation on a tinnie should be good. A lot of people have dramas with transducers at speed... but 10-12 knots isnt good.

[ANYFISH]

Gday mate
I have just read the book that came with my furuno and airmar transducer and it said to fill the gap with an epoxy. So i guess aryldite will do the trick. Just make sure it is a smoothe transition between hull and transducer so there is no turbulance. The book also said to keep the bottom faceabout 2-5degrees lower at the rear of the transducer to help with smoothe water flow.

Is tht a rib in front of the transducer in the photo?? Just check for anything that would create turbulance in front of the transducer along the hull.

Send a pm if you want more info from the book

Cheers Anyfish

[Whitto]

Mate forget about filling up gaps the transducer isn't low enough, get the top surface of the transducer at least inline with the bottom of the hull......You will definatedly see a big difference........Whitto

[finding_time]

Scott

I'm inclined to agree with the others but could you post a side on shot so i can have a look at both depth and angle!

Ian

[Pridey]

Btw, Nice outboard...

[Spaniard_King]

Yeh Scott.. the boys are onto it.. get it deeper.. but as Ian said give us a look from side on.

Y ou really cant have them too deep...they will just create a bit more spray

[disorderly]

Btw, Nice outboard...

She's a little beauty,that one .

Guy's, I will get a better photo this afternooon....
The front edge is mounted between 2 strakes and is flush with the bottom of the hull.
There are 2 reasons why I am not sure about lowering it further......
One is because I am wary about having it smashed by floating debris.....
The other is the shape which would catch the water and direct it upward...it's an odd transducer.
I also have a garmin transducer which is more the conventional shape, mounted at a similar height, just to the right of that furuno one and it works much better at speed .

Anyfish,is this the same transducer that you have?

Scott

[finding_time]

Scott

Here's a pic of my old ub's transducer it read perfectly all the way to 30 knots. See how the line of the hull hits about half way up the transducer and the transducer is very very slightly facing foward. It is always going to get clean water across it's face

Ian

[Thunderbird]

By what everyone's said Ian, your transducer is sitting to high as well. perhaps it doesn't have anything to do with the transducer or boat.. could it be all the computer interfearance from the engine management systems on those evinrudes? yeah more like it..

[FNQCairns]

yeah get it down deeper and lower it's bum somewhat, mine will only work well with twice the advised angle then you you can do away with the filler at least as a part trade.

I have the airmar and they are very hard to get working apples to apples, they need to be deep, a foot down would suit mine perfect!

I had to throw away my learned rule book and go aggressive with depth and angle, finally it now works OK not great but OK.

Blokes with deeper V, glass or plate with no or less lifting stakes than a pressed tinny get the easy airmar fitting options.

We have to dance around it a bit more.

cheers fnq

[shanza]

Hi scott

I had a similar problem when i first installed my furuno, i did everything as per manual but still had poor readings at speed. I fixed this by lowering the transducer into the water more and it now works like a dream.

Hope this helps

shanza