Humminbird Side Imaging Forums

Side Imaging Forums => 798c SI => Topic started by: gofission on April 10, 2011, 08:11:10 PM

Title: SI transducer on deep vee transom
Post by: gofission on April 10, 2011, 08:11:10 PM
I mounted my 798 ci HD SI transducer on my 23 degree deep vee hull using the manual directions. The inside edge lines up with a staight edge like it should.  I notice that the outside of the TD is way below the hull line. It looks like it will make a heck of a rooster tail. I launch in 6 days. Any thoughts?
Title: Re: SI transducer on deep vee transom
Post by: sonar2000 on April 11, 2011, 11:54:15 AM
As always a picture or two would help with the visualization. 
You are correct in that it may rooster tail..
Chuck
Title: Re: SI transducer on deep vee transom
Post by: Roddy on April 11, 2011, 10:15:17 PM
sir; I had to make a top spray cover for one install on a deep V. simple .060 sheet steel 1.5" wider than xducer bent in the shape of an "L". It worked.  :) Enjoy Roddy
Title: Re: SI transducer on deep vee transom
Post by: Humminbird_Greg on April 12, 2011, 01:52:20 PM
If it does than just install the roostertail plug that was packaged with your unit.
On some boats (especially deep-vees) you have to mount the transducer this low.

Title: Re: SI transducer on deep vee transom
Post by: gofission on April 12, 2011, 06:22:54 PM
If it does than just install the roostertail plug that was packaged with your unit.
On some boats (especially deep-vees) you have to mount the transducer this low.

Ok all my stuff is at the shore. Heading down thurs night. I'll take a few pics of the mount. I do not remember seeing a rooster tail plug. Anyone have a pic of this plug?
Title: Re: SI transducer on deep vee transom
Post by: sonar2000 on April 12, 2011, 06:32:30 PM
Not all units shipped with the plug...
Let me look around the forum.  there was a picture of this a while back...
Chuck
Title: Re: SI transducer on deep vee transom
Post by: sonar2000 on April 12, 2011, 06:59:35 PM
Well, I looked for a while and I cant find the picture.
So I went to the humminbird web and searched under tranducer accessories and while they show all the transducer mounting stuff none of the pictures show the rubbber plug.
I did find mention of a yell sheet that comes with a unit that has the ruber plug but could not find any pictures of the yellow sheet or the plug...
Anybody else???????

Chuck
Title: Re: SI transducer on deep vee transom
Post by: Humminbird_Greg on April 14, 2011, 03:38:05 PM
I was thinking that all of the 798 units shipped out with the roostertail plug (unless someone did not put it in the box…).  It should have been in a small plastic bag by itself – it’s black and oddly shaped.  I don’t have a picture of it.  I think we stopped the yellow sheet a while back Chuck.
Title: Re: SI transducer on deep vee transom
Post by: sonar2000 on April 14, 2011, 06:27:48 PM
Greg, I also heard that not all units shipped the plug.  Confirm they are still shipping the plug.  Why is the yellow sheet not included?
Chuck
Title: Re: SI transducer on deep vee transom
Post by: gofission on April 15, 2011, 01:31:23 PM
OK took some pics. These are after I moved it up 1/4 inch. I think it will be ok. Launching the boat in an hour.[attachment=2][attachment=3]
Title: Re: SI transducer on deep vee transom
Post by: sonar2000 on April 15, 2011, 02:04:03 PM
How much of that paint did you get on the transducer.  Did it cover the bottom of the ducer also?????
Chuck
Title: Re: SI transducer on deep vee transom
Post by: Roddy on April 15, 2011, 03:34:08 PM
Get the paint off the XDUCER ASAP!!!!!! :-X :'( Roddy
Title: Re: SI transducer on deep vee transom
Post by: gofission on April 15, 2011, 05:12:56 PM
the paint is water based. The bottom of the TD is painted with transducer paint.
The unit works ok but test conditions could not be worse. The TD throws  a wall of water onto the engine cowl.
Title: Re: SI transducer on deep vee transom
Post by: sonar2000 on April 16, 2011, 11:43:23 AM
YEP....anything above 1 or 2 mph will probably do just that. 
A lot of posting on this forum about transducer location, speed, roostertail and loss of depth at speed.
Chuck
Title: Re: SI transducer on deep vee transom
Post by: gofission on April 16, 2011, 04:26:30 PM
I was thinking that all of the 798 units shipped out with the roostertail plug (unless someone did not put it in the box…).  It should have been in a small plastic bag by itself – it’s black and oddly shaped.  I don’t have a picture of it.  I think we stopped the yellow sheet a while back Chuck.
Found the plug in the box under a small section of folded cardboard seperate from the transducer parts. Dont know why they didnt just put in with the other parts.
Title: Re: SI transducer on deep vee transom
Post by: sonar2000 on April 16, 2011, 04:52:14 PM
Makes ya wonder if others have thrown it away not knowing it was there.  Did you have a yellow sheet on the plug?  Greg, did say they stopped shipping that awhile back.  It would have been a good reminder...
Chuck
Title: Re: SI transducer on deep vee transom
Post by: gofission on April 16, 2011, 05:05:18 PM
Yes it was in a bag with the plug. Since nothing in the installation guide mentioned the plug, there was no reason to root through the packing materials. I would imagine a lot get tossed. Hope it helps.
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