PhantMan:
you've just
supported the transom weight with the ground instead of leaving it
hanging. - pretty simple-
Is that what you meant by "please explain"?

"JimH" wrote:
Yes. But how does that solve my overweight at the tongue with the boat on
the trailer?
My goal is to take weight off the tongue while providing good bunk support
to the stern/transom.

The best solution is to move the trailer axle forward on the frame.
Normally, I'd say that's the only solution.
But since you only use the trailer for storage, and if you don't want
to go to any trouble or expense, a second choice could be to scoot the
boat back a little on its bunks (thus taking weight off the tongue)
and support the overhanging transom with blocks while stored. It's
cheap and easy to do, Granted, that alternative won't do any good
while trailering but with no outboard hanging off the transom, and if
you trailer the boat only twice a year (to/from storage) it may be
enough. That'd be your call.

Rick ----- if it were me though, I'd move the axle forward