If the holes are small you may be able to fill them with rivets. Drill them
out to the correct size for the rivet and then drive the rivet normally. It
is also possible that you may want to install a doublers over the area - a
small patch cut to cover the area of interest.

There are some watertight aluminum pop-rivets. These may be an option for
you.

Mark Browne


"Jason" wrote in message
...
I am upgrading my fish finder. the boat it aluminum.. how do i deal with
the
old holes? Stainless steel screw with some sort of silicone?

thanks