The rules are clear:

EITHER: An operating motor which can propel the boat at a speed of at least 4 knots in smooth water and one (1) gallon of fuel with the motor secured directly to the support post under the cockpit while racing,

OR: 45 pounds of weight secured directly to the support post under the cockpit while racing.

A motor carried while racing has to: a) operate, b) propel the boat at 4 knots in _smooth_ water (implies 0 wind), and c) you must carry at least 1 gallon (though it doesn't need to be in the engine--only the motor needs to be secured to the support post)

:: The key words are "Either" and "or". Your motor doesn't
:: have to weigh 45 lbs, it just have to be able to move
:: the boat at 4knots. Now in what conditions is another
:: topic for discussion probably. Down a 30 foot wave you
:: wouldn't need much, but upwind in the ocean you would
:: probably need a 25 hp motor.
::

:: -Jason

::
::
:: :: The Way i read the class rules the must be a least forty
:: :: five Lbs of Motor weight.
:: ::
:: ::
:: ::
:: ::
:: ::
:: :: :: I've used a 4hp evinrude 2-stroke, and it works great.
:: :: :: 35# isn't too big to carry, and it does full speed on
:: :: :: the return trip from the delta.
:: :: ::
:: :: :: :: I would like to replace my 2 hp honda with little biger
:: :: :: :: motor.
:: :: ::
:: :: :: :: Alternative 4-5 hp tohatsu? Is the standart motor mount
:: :: :: :: capable of carring such load?
:: :: ::
:: :: :: :: It is twice the weight -around 55lbs.