Originally Posted by CarbonSink62
I have heard that peanut butter works as a temporary medium when you are trying to find a good location.
I hadn't heard of the oil trick.
Isn't there special 'transducer goop' made for semi-permanent installation?
Common hardware store silicone sealant is fine. You can remove it if you ever change your mind. The PVC pipe filled with liquid is another solution, but more work and perhaps not as trouble-free as simple silicone. Just remember when you're testing the spot on your hull that there can be no air bubbles under the transducer, which is why I suggest the "pool" made with modelling clay. If it works ok, just remove the clay and clean the surface well and mount the transducer in a gob of silicone. It's a 30 minute job.