RangerGuy Posted May 14, 2008 Report Share Posted May 14, 2008 So I have to replace my transducer this week before the long weekend. So I figured this is a timely question After installing the first one as per Lowrances instructions with the line on the transducer level with the bottom of the boat. Thing is I get a small rooster tail off of the transducer when running at high speeds. Is this normal or do I have it to deep? Link to comment Share on other sites More sharing options...
Sinker Posted May 14, 2008 Report Share Posted May 14, 2008 Mine does that too.....normal I think. as long as its not above the bottom of the hull, and its far enough away from the engine's turbulance, you should be good to go. Sinker Link to comment Share on other sites More sharing options...
RangerGuy Posted May 14, 2008 Author Report Share Posted May 14, 2008 Cool thanks.. just wasn't sure because I was changing the position a few times with the orginal one trying to get to work good without a roaster tail thinking I had it installed wrong LOL! Link to comment Share on other sites More sharing options...
pikehunter Posted May 14, 2008 Report Share Posted May 14, 2008 Mine does the same thing, drives me nuts if I start paying attention to it, so I do my best to ignore it and not look back at higher speeds. A good tail wind and it sprays into the back of the boat. Hopefully somebody has an easy solution. Link to comment Share on other sites More sharing options...
purekgw Posted May 14, 2008 Report Share Posted May 14, 2008 they will do that because there level with the hull of u boat and its displacing water just like your boat so it would have a small spray Link to comment Share on other sites More sharing options...
POLLIWOGG Posted May 15, 2008 Report Share Posted May 15, 2008 The flat transducers could be siliconed to the hull to stop that. I just got a new setup and it has a spray shield above the transducer that is a piece of metal that snugs up to the boat and mounts at the 4 bolts. Link to comment Share on other sites More sharing options...
firefisher Posted May 15, 2008 Report Share Posted May 15, 2008 Hey Polliwogg Where did you pick up the spray shield. Sounds like a cool setup. FF Link to comment Share on other sites More sharing options...
Greencoachdog Posted May 15, 2008 Report Share Posted May 15, 2008 If you're getting a roostertail off of your transducer it's installed too deep, raise it a little. Link to comment Share on other sites More sharing options...
POLLIWOGG Posted May 15, 2008 Report Share Posted May 15, 2008 The spray shield came with the transducer because these are different and mount below the hull, it would be easy to make as its just a flat piece bent U shaped at the sides to mount into the 4 bolts. Its an interphase scanning sonar. I'd try like the Dog says and try to tweek it a bit, on my regular sonar as soon as I'm happy with the position of the transducer something hits it and I'm at it again, right now I loose bottom at 50'. Link to comment Share on other sites More sharing options...
RangerGuy Posted May 15, 2008 Author Report Share Posted May 15, 2008 Just found an interesting article. Thought I'd share Transducer Installation This is where the unit was installed when I purchaced the boat and I installed my 102c transducer in the same spot just a little lower cause the original unit would loose bottom when running. I'm thinking based on the link above. I should move it over to the right of the step in the hull. Because when running full out if I don't turn down the sensitive I get a full screen of interernce but still get a good depth reading Link to comment Share on other sites More sharing options...
Greencoachdog Posted May 15, 2008 Report Share Posted May 15, 2008 Just found an interesting article. Thought I'd share Transducer Installation This is where the unit was installed when I purchaced the boat and I installed my 102c transducer in the same spot just a little lower cause the original unit would loose bottom when running. I'm thinking based on the link above. I should move it over to the right of the step in the hull. Because when running full out if I don't turn down the sensitive I get a full screen of interernce but still get a good depth reading That's a good article, and it does look like it needs to move to the right. I like this statement from the article: ResultsWith this particular installation the results have been excellent. The transducer stays in contact with clean water off the hull at all speeds. Good bottom echoes are obtained at all speeds up to the boat's maximum of 35 MPH. Also, the transducer is not throwing its own little roostertail behind the boat. The lack of such a roostertail is a sign of a good installation. Link to comment Share on other sites More sharing options...
pikehunter Posted May 15, 2008 Report Share Posted May 15, 2008 Thanks GCD, mine is installed with the bottom of it just projecting below the hull maybe say an 1/8" or 3/16" I have tried tilting it up a little and down a little. Either way it sends a rooster tail up higher than the transom. BTW, dealer installed when the boat was new. Link to comment Share on other sites More sharing options...
Greencoachdog Posted May 16, 2008 Report Share Posted May 16, 2008 Thanks GCD, mine is installed with the bottom of it just projecting below the hull maybe say an 1/8" or 3/16" I have tried tilting it up a little and down a little. Either way it sends a rooster tail up higher than the transom. BTW, dealer installed when the boat was new. The 2 main screw holes on the mounting bracket should be slotted so you can adjust the depth of the transducer, there will be one screw you'll have to remove to let the bracket slide up or down. Fill the 3rd screw hole with a good marine grade silicone caulk or epoxy. The 2 screws in the slots will hold it until you get it tweaked out up or down, then when you're happy with it redrill for the 3rd screw. Tilting the transducer will give you a false depth reading because it won't be shooting down directly under the boat, it'll be shooting at an angle in front of or behind the boat (out towards Aunt Nancy's house somewhere). Link to comment Share on other sites More sharing options...
DanTheMan Posted May 16, 2008 Report Share Posted May 16, 2008 angle in front of or behind the boat (out towards Aunt Nancy's house somewhere). L-M-F-A-O Link to comment Share on other sites More sharing options...
wallyboss Posted May 16, 2008 Report Share Posted May 16, 2008 I tought that the best place on a fiberglass boat is to mount it inside, the transducer shoots thru the fiberglass. Link to comment Share on other sites More sharing options...
Billy Bob Posted May 16, 2008 Report Share Posted May 16, 2008 GUYS, just tilt the transducer a little bit forward. This does two things, stops the rooster tail and forces water over the complete surface of the transducer at high speeds which give you a good reading at any speed. YES it will shoot the cone angle just a little bit forward but not enough to matter. This installation practice has worked for me for MANY depth finders I have installed for myself and other. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now