1kw transom mount

Have fitted a 1kw transom mount for my Furuno sounder but am having touble with the large unit throwing a rooster tail into the air. Have put the unit in just abpout every posssible position but having no luck. The sounder reads clear to about 34knt but sends this rooster tail about 8 foot in the air. Originally i thought the unit was too low but have moved it near on out of the water but still no joy. Any tips would be great, have heard of a splash cover anybody seen these?

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I actually fish.


Ashram's picture

Posts: 134

Date Joined: 23/10/09

Picture

Sun, 2009-11-01 07:31

 

Do you have a photo of the transducer on your transom to have a look at? Is it the kick up bracket style or the peg leg looking mount?? Mind you getting 34knots and a clear picture is a good result.  I have heard of people constructing a splash guard to stop the water going on the outboard but I have never come across them as an off the shelf item.

Cheers Rhyss

81macca's picture

Posts: 270

Date Joined: 02/07/09

Dead camera

Sun, 2009-11-01 07:46

Dont have any pictures but is the stainless bracket with the brake away washer set up.

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I actually fish.

Ashram's picture

Posts: 134

Date Joined: 23/10/09

  Yep I know the one. The

Sun, 2009-11-01 07:57

 

Yep I know the one. The bracket may need wedging out on the transom but personally I think getting that picture at that speed is a good result and dont want to see you fiddle around and get a bad picture in the end.  Next time you are out get your mate to drive and have a look over the back and see where and why the water is pushing against the transducer.  You might be able to rectify it then.  Sometimes its even a skin fitting just changing the water shape and causing the hassle.

 

Good luck

81macca's picture

Posts: 270

Date Joined: 02/07/09

Have tried placing wedges

Sun, 2009-11-01 08:26

Have tried placing wedges and have looked over the back seems have tried everything but the splash guard. Best position i have had is that high up that on a plane the braket is out of the water, tells me maybe its the bracket sending the water up not the transducer. Any other brackets? (is on a trailcraft 6.10)

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I actually fish.

Simon C's picture

Posts: 801

Date Joined: 01/05/07

no solution mate - just weld

Sun, 2009-11-01 08:40

no solution mate - just weld a plate above it to deflect it out of the motor. Mine sends a huge roost at speed but still reads at 30knots. Really it is like a big trim tab so anytime you are having something that big in the water it will throw up a spray!

Ashram's picture

Posts: 134

Date Joined: 23/10/09

Peg Leg

Sun, 2009-11-01 08:48

 

There is one that allows you to pull it up and down.  You use your existing transducer and screw it to the bottom of the bracket which looks much like a prosthetic leg.  I'm not sure if that will sort the problem though.  I have seen more of this type of bracket kick up a rooster tail than the kick up bracket.

I think on the trailcraft they put a bracket to attach your transducer and bracket to it might be that welded bracket that is giving you the grief.

dan from Styx Marine might be able to help you out.  he used to work for trailcraft and now builds his own.  he is a FW member (daniel_hughes ). Try dan for some ideas.

Cheers 

 

alfred's picture

Posts: 3097

Date Joined: 12/01/07

The tranny needs to be

Sun, 2009-11-01 09:16

The tranny needs to be behind a skeg or step.  If it is at the V it will have to be set lower to get a good reading, but will throw a tail.  This is set just 3mm lower then the skeg line and gets a solid reading at WOT with no rooster tail.  

 

alfred's picture

Posts: 3097

Date Joined: 12/01/07

Quick fix is a 2 liter soda

Sun, 2009-11-01 09:25

Quick fix is a 2 liter soda bottle and cable ties.  Just cut the neck so you have half a funnel this will mount over the tranny cover, up the gap between it and the bracket.  I am willing to bet the water is coming from between the tranny and mounting bracket.

Tony Halliday's picture

Posts: 2500

Date Joined: 14/06/07

I have a few in my pics of my set up

Sun, 2009-11-01 10:10

I have a few in my pics of my set up in my gallery,
http://fishwrecked.com/image/tranducer-installed
http://fishwrecked.com/image/tranducer-bottom-view
http://fishwrecked.com/image/1-kw-trannie-set

thats a 1kw commercial transducer connected to a Furuno 585, ( now sold the unit, cause an upgrade is on it's way... :-)..)

I have it offset from the motor, about 30cm max and runs clear of the bottom of the hull and in the clear water.

I have not done more than 20 knots with my tub, but don't get any rooster tail at all.
if you look at the bottom of my unit, it has been cleanly bridged to the hull.
You may want to make up a small allie type flare to ensure that the water can not come up between the hull and the front leading edge of you transducer.

I think the guys are right in saying the water is coming up where a vacuum is being formed by gap.

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Tony Halliday: ~Meals on Reels ~

 It takes a strong fish to swim against the current. Even a dead one can float with it

"It is always in season for old men to learn." Aeschylus (525-456 BC)

"In a mad world only the mad are sane." Akira Kurosawa (1910-1998)

81macca's picture

Posts: 270

Date Joined: 02/07/09

Cheers thinking of fabing a

Sun, 2009-11-01 10:38

Cheers thinking of fabing a new bracket. Yeah do think its coming from gap between tranny bracket and hull.

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I actually fish.

Faulkner Family's picture

Posts: 17182

Date Joined: 11/03/08

def the gap ,had the same

Sun, 2009-11-01 22:50

def the gap ,had the same prob but mine was a 600 wat transducer. found it was sitting just a fraction too low in the water, good luck with the fix

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RUSS and SANDY. A family that fishes together stays together

Posts: 8

Date Joined: 19/11/09

Hi Alfred, May I ask what

Fri, 2009-11-27 23:32

Hi Alfred, May I ask what kind of motor you have on your boat or the boat you have pictured? The reason I ask is because I have the same Transducer and bracket as you but I was told to install mine on the Starboard side of the boat because of the rotation of an outboard prop. Mine seems to be working ok with my Furuno 585 but because it's all new I'm still learning to read it... and now seeing the picture your've posted I'm questioning whether I have my Transducer positioned properly.

Posts: 9358

Date Joined: 21/02/08

He has a verado and it spins

Sat, 2009-11-28 05:16

He has a verado and it spins in the same direction as most. Convention has people putting them on the right side of the motor, but the left works too.

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alfred's picture

Posts: 3097

Date Joined: 12/01/07

Till is right, it is a Verdo

Sat, 2009-11-28 08:13

Till is right, it is a Verdo and it spins in the conventional direction.  Normal instructions suggest it should be placed on the starboard side due to prop wash.  I have it on the port side only because I know it is in a "clean wash" area on my hull.  On the port side it will second as a lifting tab.  Due to the prop rotation, that side of the hull will be lower when the motor spins.

fishcrazy's picture

Posts: 1235

Date Joined: 27/01/07

left

Sat, 2009-11-28 10:19

had mine mounted on left side never had a prob