Re: HP rating!
I'd say both are definite factors. A four stroke outboard of equal horsepower to a two stroke will stress a transom more simply because it weighs considerably more. And usually...the higher the hp (2 or 4 stroke) the greater the weight.<br /><br />Bottom line is...boats with BIA certification list the maximum rated horsepower. This rating is not necessarily dependant on what stress the transom can withstand, rather how safely the boat will perform under most conditions. Do not exceed this hp rating.<br /><br />Walt
