"Short Wave Sportfishing" wrote in message
...

You can mount the transducer by the outdrives, just keep the
transducer in clear water - when you run the boat, just take a look
over the stern and note where there is clear water and mount the
transducer there.

Another option, based on my experience: I found that there IS no perfect
place on the transom of my yacht. But, I wanted the depth finder primarily
for learning the bottom shapes of my favorite bodies of water, for fishing
purposes. The instructions said that if the thing didn't work right, it
would be mostly at planing speed. I figured that I was more likely to
investigate specific spots at much lower speeds, so I went ahead and bought
the depth finder. Using some existing hardware on the transom and the
outboard's bracket, I mounted a temporary piece of wood to use as an
experimental mounting surface. After trying about 8 locations, I narrowed it
down to one spot. The depth finder's bracket had slotted holes, which
allowed me to fiddle further with vertical adjustment.

Yet another idea: He could design some sort of post on which to attach the
transducer, making the post so it could be slid upward a few inches to get
the thing out of the water for beaching. PVC tubing comes to mind, but that
might vibrate too much as water moved past it. Perhaps some of the synthetic
decking lumber....