I would think this another good reason to run fuel injection
       since the
       fuel never sits in a bowl. The fuel is continually circulated
       through
       the fuel system. Any water should settle in the tank. And if
       there is
       any water it would flow through the system with the fuel. It may
       not run
       excellent, but it shouldn't quit. Is this correct thinking? Or am I
       setting myself up for some false hope?

       Bob Mears



   Bob,

   Yes logically you are correct depending of course on where your sump and
   fuel pick-up is located.  Note, a mechanical pump fuel injected SeaWind
   with an IO-540 engine lost power and had to land in a field a few years
   ago because it had water in the fuel lines. The pilot knew the airplane
   had experienced a submerged wing incident and thought he had removed all
   the water from the fuel system before flying.

   In this case prevention is the best cure.  Keeping the fuel tanks full,
   and having locking caps to keep them full, would be best way to prevent
   condensation from ever occurring.

   Doug

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Bob,

You are right, that is one of the real beauties of our high pressure and
high flow systems.  Any water in the line quickly circulates back to the
tank and is harmlessly mixed with the fuel.  If it dosent mix, at least
it is never in the line long enough to cause more than a hickup.  The
other great advantage is that vapor lock is essentially impossible as
well.  This is different from aircraft injection systems like on the
IO-540 that Doug mentioned.  Those are one-way low flow systems.  Some
have a purge that will clear water or fuel vapor before start-up, but
the purge wont clear water or vapor that is between the valve and the
injector.  It also wont purge what gets into the line after the engine
is started.

Think about it.  Our system has zero chance of vapor lock (even with
auto fuel on hot days at high altitude), zero chance of carb ice, and
water is only a problem in very large quantities.  This is what we mean
by advances in automotive techniques that dont show up in certified
aircraft because of the cost of recertification is too high.