Do you pass your cables through a drain plug?  If so, did you put a new one in?  Or, perhaps 'Hobie-type-through-hull-cable grommet things'? Drill a hole just big enough, then goop it up?

 

Mostly unrelated rant.....I'd really love to have one definitive Kayak Fishfinder sticky thread.  When I get a few minutes one of these days, I'll grab up what I think are the 'good' threads and put links into one.  There's great information on here, but it is so scattered, that it is a bit tough.

I put a home depot drain plug in one boat, and I use a hobie fish finder plug in another.

The hobie kit is pretty much the best way that Ive found.

I have a sit on top pelican, I cut a hole just big enough to fit the transducer through, glued it in the bottom, and mounted my ram mount over the hole, and sealed it all up with 3m 5200. 

what kind of kayak do you have and what kind of method do you want to do for the transducer?  i bought the yakattack cellblok (granted more than i wanted to spend at the time) but it really is an all-in-one solution.  best part for me was that i drilled ZERO holes into the kayak.  second best part is i can remove the whole unit in about 15 seconds, if that long.

I've got a Wilderness Tarpon 100.  I used duct seal to mount the transducer and made a battery seat with some styrofoam blocks.

I was at West Marine yesterday to pick up their wire caps:http://www.westmarine.com/buy/west-marine--two-hole-wire-caps--P003_094_010_501

Unfortunately, the pics don't tell the 'hole' story.  The four screws that hold the top of the cap to the base are much longer than both pieces and would penetrate the hull.  I'm sure it would be secure, but I am not thrilled with making 5 holes for this task. 

I've been looking at the Hobie wiring kit, but haven't worked up the nerve to pull the trigger....I am having trouble accepting that I must pay $23 for a fifty cent plastic hole.