I have mounted several of the Garmin ECHOMAP UHD 73sv Fish Finder/Chartplotter Combos lately.
Very easy install and nice unit.
I've had to modify the mounts to get it to tuck up nice in the hull on under mounts.
No problem when installing on yak Attack side mount.
Please share tips, tricks, mods to mount through scupper hole. Navarrekayak.com appears to have a solution for it. I reached out to them-Nick. No response yet. I’m trying to avoid using the switchblade product. It will be in the way of rods and anchor trolley’s on my Big Rig.
I mounted my transducer in the scupper hole. I used a schedule 40 gray sprinkler riser/nipple for the shaft through the hole. Cut a groove in the threads on the one side letting the pipe mount to the stock bracket. On the top side I used a pvc cap. That's it for mounting. I glued a length of 1/2 inch landscaping tubing down one of the grooves on the bottom and ran my cable through. Cable enters at the rear through a pass through and runs inside to the gunwale (gunnel?) where I installed a 12 pin CNLINKO panel mount bayonet connector. Of course this entails cutting your cable. Then the stock 12 pin connector to the matching 12 pin CNLINKO plug. Custom install, custom lengths, very modular.
I can take some pictures tomorrow evening if you like.