Any ideas for a fish finder which would be mounted on a kayak.  I looking at getting one, but it would be my first time ever doing it

Mine is on the dash, and the transducer is mounted in the scupper hole.

Look up Kayak Bass Fishing, and Kayak Fishing Stuff, and you will find tons of rigging related info.

thats such a great setup u have J franco !   keep seeing those pics lately

Wait until you see my next boat......

does your transducer go through the hull? or does is it mounted within the kayak?  also any good names for a fish finder?  i not looking to spend an arm and a leg however

There's a drainage scupper hole, and the transducer goes there.  http://www.oceankayak.com/kayaks/angler_editions/prowler_big_game.html

You can silicone it inside the hull, as long as it shoots straight down.

J, for the best performance do NOT use silicone to glue transducers to boat hulls. The soft material will absorb the sound waves and prevent accurate readings. The boat hull should vibrate at the same frequency as the transducer so a hard, thin, bond is necessary. A slow cure epoxy is recommended for that purpose so bubbles in the mix are reduced as comparred to the fast cure types.. The instructions for shot-thru mounting is in the manual included with the units.

Maybe silicone was the wrong word...marine goop works well, just do it in warm temps to avoid bubbling, and place some weight on it while it cures.  I would not recommend permanently attaching the transducer to a kayak. Here is a primer article on kayak electronics: http://www.kayakfishingstuff.com/drupal/content/kayak-depth-finders. I know guys that have used things as simple as petroleum jelly and duct tape to temporarily mount them with good results.

I won't say this is the best way, but it works for me. I took a 2 cup Chinese food container, cut a hole out of the bottom,GOOPed it to the bottom of my kayak. Mounted the transducer to the lid, filled the cup with water, snapped the lid on. I did it this way for two reasons, I can take my set-up out with me, I also can use in my other kayak. Seems to work well. I didn't like the idea of leaving the trans. permanently attached to my kayak. I had no scupper either.

I won't say this is the best way, but it works for me. I took a 2 cup Chinese food container, cut a hole out of the bottom,GOOPed it to the bottom of my kayak. Mounted the transducer to the lid, filled the cup with water, snapped the lid on. I did it this way for two reasons, I can take my set-up out with me, I also can use in my other kayak. Seems to work well. I didn't like the idea of leaving the trans. permanently attached to my kayak. I had no scupper either.

Thats ingenious. That helps a lot, because like you, I do not have a scupper.  Does it stay mounted pretty firmly?

If you go ahead with this strategy, please report back, and take pictures.  I've never seen such a rig in person.

i will, but it may not be for a while...  its still in the early stages.  i still looking at some fish finders

I won't say this is the best way, but it works for me. I took a 2 cup Chinese food container, cut a hole out of the bottom,GOOPed it to the bottom of my kayak. Mounted the transducer to the lid, filled the cup with water, snapped the lid on. I did it this way for two reasons, I can take my set-up out with me, I also can use in my other kayak. Seems to work well. I didn't like the idea of leaving the trans. permanently attached to my kayak. I had no scupper either.

Thats ingenious. That helps a lot, because like you, I do not have a scupper. Does it stay mounted pretty firmly?

Yes it does. Plumber's GOOP is much stronger than silicone. Leave about 3/8-1/2 " of plastic on the cup to GOOP down. It's watertight, so there's nothing but water between the trans. and the hull. I have a portable Lowrance fishfinder that came with a suction cup mount for the trans. I removed the suction cup, attached the bracket to the plastic top of the Chinese food container. Fill it with water, snap it down, then remove it to take your FF home. The cup stays on the yak. I have another kayak I use, so I stuck another cup on that one. Have fun.

i will, but it may not be for a while... its still in the early stages. i still looking at some fish finders

If you can swing it, get a sonar/GPS combo unit.  I have a HB 383c Combo, and while the screen is a bit small, having GPS and the graph is very helpful.

J Francho what kind of battery are you using?