Some outboards just had a "hot horn".  That *could* be a hot horn.
It seems easy enough to trace the wire colors and see where they go.
-W
"tcoop"  wrote in message
.  ..
 After looking a little closer, I think your right about it maybe being the
 actual boat horn. I read that the warning horn maybe under the dash on
some
 boats and I was hoping that was it. I was told that going into some of the
 control boxes can be a tricky job due to all the wires. I really couldn't
 tell where the wires for that horn go, but i feel like it is indeed the
boat
 horn.
 You said the alarm should work when the ignition is in the on position,
 prior to the cranking position.  I don't quite understand what you are
 talking about. Wouldn't it sound off when the engine was started? Did i
 mention that I was new to boating and this is my first boat? So sorry for
 maybe not understanding everything that I should, but I will learn
it...:-)
 Thanks for your time and your help.
             Tom
 "Tony Thomas"  wrote in message
 news:47%mb.38895$e01.85121@attbi_s02...
  Looks to me like the horn for the boat itself (like a car horn).  Not
the
  alarm for the engine.  What is it wired to.  I would assume the horn
  switch/button.  The warning alarm for the engine is usually a small
black
  round device about the size of a 1/2 dollar.  Some are wired under the
 dash
  and others are wired inside the control box.  The alarm should operate
 when
  the key is turned to the ignition position but prior to cranking the
 engine.
  If it does not, have it checked or replaced.
 
  --
  Tony
  my boats and autos - http://t.thomas.home.mchsi.com
 
 
  "tcoop"  wrote in message
  .  ..
   Can someone tell me if this is a warning horn, and if so, is there a
way
 I
   can test it?
   http://coopscorner.com/takealook/warninghorn.htm
   This is on a Hydra pontoon boat, which they don't make any more.
           Thanks,
           Tom