If I DO change motors, can someone explain what exactly is the difference in long versus short shaft? Are we talking about the overall length the prop sit DOWN in the water, or the length of the shaft the propeller rides on? <br /><br />If it refers to the amount of the engine that sit DOWN in the water, is there any reason my little boat can use either engine? Obviously an engine that sits deeper in the water, will hit bottom before one that sit shallower...is this the only concern? <br /><br />Or to put another way, is there some formula that determines how far the prop should be below the bottom of the boat's hull?<br /><br />Rob
