bilge transducer install

[sirmo]

Getting ready to install a shoot-thru hull hummingbird transducer. This will eventually Y with the external side imaging transducer.

In the bilge, there is an existing Lowrance transducer. I'd like to skip the step of removing and grinding the existing one. Seems there is plenty of room to install it elsewhere.

Question is, what method do I use to temporarily hold the transducer down to test in water before permanent install?

Might post this in the h-bird forum as well.

[DREWTICK]

Sand bag, and a big glop of vaseline under the ducer