David,
You could try a plastic sleeve. If you have access to a lathe, just use a
bar of nylon. Turn the OD to the size of your old xducer and bore it the
size of the new. Simple, mount as before.
Steve

"David Edney" wrote in message
...
I have just purchased a new depth sounder (NAVMAN) for my Nicholson 32 and
the through hull transducer is a smaller diameter than the one I wish to
replace, does anyone have a suggestion as to the best way to do this.

Thanks
David Edney

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