-> Sorry, most all boat motors that have come through the shop have been
-> standard rotation for the motor it was based upon.
Dan: As you stated most motors are the standard rotation, but motor and
propeller are the determining factor. In some cases the engine in a boat
is designed to work anti-clockwise and a gear box provides the final
rotation direction. A engine rotating clockwise and propeller turning
anti-clockwise would produce a cancelling torque. Direct drive power
trains in the case of dual engines would have to have one engine turning
anti-clockwise.
-> Again, most water pumps are designed to rotate in a particular
-> direction.  The vanes are the key.  Marine pumps are usually
-> made to pump in either direction.  Further, they are expoxy
-> coated and use stainless steel components.
   What you are saying is correct as in most cases of marine
applications, changes are made in the design of any motor for increased
safety and cooling operations. I know there are carburetors designed as
a sealed unit to prevent any possible leakage of fuel into the bilge of
a boat. Marine engines are designed to operate at cooler
temperatures compared to an automotive designed engine. Other changes of
course is the manifolds which usually uses water to baffle the exhaust
fumes and gases. I have seen cases where the thernostat is the same as a
car, but I would think this would only be suitable for fresh water
applications. Salt water applications would probably involve using
stainless or other corrosion resistant materials.
                                                    George
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