Christos,

This sounds like a straight forward question, but it unfortunately is not.
It really depends on the boat. Not just on the boat's lines (hull shape)
but also on the boat's weight distribution (not just weight). If you own
the boat, and are considering putting a motor on it that weighs 350#, then
it might be worth your while to actually load the boat and then take a look
at it. Buy seven 50# bags of 'tube sand', or fill buckets or whatever, and
place the weight in the stern. If a motor is already on it and you know how
much it weighs, then it would be better to just make up the difference, with
sand or bricks or whatever, and take a look. I know a guy who did this, but
he was trying to maximize fuel storage in a boat he was building and was
doing some 'manual weight and balance' work and already knew what motor
he was going to use.

Brian

--
My boat project: http://www.advantagecomposites.com/tongass


"christos" wrote in message
...
18 feet boat with an outboard motor of 350 pounds at the aft end how much
will submerged in the water
the boat weights 1600 pounds without engine.
christos