Would I be able to use one of these transducer on my Capri which has coremat as the core material in the fiberglass hull? Or does having a core material require a through hull transducer? Thanks.
You have to try it. Put the transducer in a ziploc bag filled with water and move it around the hull. Find out where it works the best( if it does work)then put a big glob of silicone and mash the transducer in without any air bubbles.
Thank you Don K. I must not know how to effectively search this forum as I did try to find the info before posting knowing I was unlikely to be the first to ask such a question. I appreciate your patience and giving me an answer that I can use. Fair winds.
The "o" and "i" are next to each other on the keyboard, so I thought it may have been a typo, I've used the Ziploc bag method successfully several times. The bag should be partially filled, When you set the transducer on it, push down a lttle so the bag squishes in like a soft pillow. Any air bubbles in the bag will rise out of the way. Try different locations until you get a nice clean return on the display. Physically check the water depth to make sure you're getting an echo from the sea bottom and not something else (my boat has a wing keel). Good luck. Peter H23 "Raven"
Peter, Thanks for the clarification, but after talking with a few other folks with cored hulls, I'm going to spend a little more money and put in a through hull transducer. Apparently, with coremat, the "shoot through the hull" will work, but only if it is in perfect condition. My boat is old, so the probabilty of a problem is high.
Putting in a thru hull is no big deal - even in the water - I've done it several times. Put your transducer - with sealent on the threads - in a plastic bag with all the wire. Put the bag in a coffee can. Using SCUBA hold the can up against the bottom of the boat. Drill the hole from the inside - use a GFI or a battery drill. Coat the sides of the hole (from the inside) with sealent. Reach thru the hole - grab the bag in the coffee can - pull the wire thru and pull the transducer into the hole. The person inside taps twice on the hole. The person outside removes the coffee can, pushes hard against the transducer as the inside person tightens the retain ring. Add to your bragging list - hook up the transducer - and wish you used the new wireless units so you didn't have to run the transducer to the instrument.
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