I would suggest a A rated CAT 3406 Turbocharged and aftercooled with 6:1
reduction and the largest diameter and flattest pitch prop the engine will
handle. You'll need to sponson the dinghy to carry the weight and come up
with some sort of rig to hoist the whole thing on and off your boat.

Seriously, nothing smaller than your Bounty is apt to be of much use in
getting you unstuck if the auxiliary won't do it. That isn't how it is done.

You hang the biggest anchor on the boat over the stern of the dinghy with a
knot you can slip. A loop around the thwart with a spare pelican hook is a
good rig. Then, you row the anchor out to the very end of the rode. You don't
want to be frigging around with an outboard at a time like this or want the
extra weight in the dinghy. If the holding ground is really poor, lower a
weight or another anchor about half way down the anchor line.

Set the anchor and run the rode back to your biggest winch if you don't have
an anchor windlass, and start hauling. If you are still stuck, try hanging
some weight and maybe a couple crewmembers from the end of the boom and
vanging it full outboard. The heel will reduce your draft a couple inches
which may be critical. With many keep profiles, moving weight forward will
have the same effect.

Make sure everyone stays well out of line with the anchor rode when the
strain is on it. If it lets go, it will snap back like a rubber band.

Or, wait for the tide to come up a bit.

BTW, right at high tide is a really, really, good time to be sure you have
plenty of water under your keel. If you are going to go poking into places
where you think you might touch, try to do it on a rising tide.

--
Roger Long



"Courtney Thomas" wrote in message
...
For a 10 ton modified keel [cutaway forefoot] GRP sailboat, what is
suggested as a probable optimal size outboard for freeing up the described
vessel upon grounding ?

I realize all the power you can get may be a good thing, but given that
the dinghy is only about 8' long, what's realistically recommended ?

What brand ?

Appreciatively,
Courtney
--
s/v Mutiny
Rhodes Bounty II
lying Oriental, NC
WDB5619