Hi!
Whether to turn the propellers inward or outward is a choice to be made by testing. Today, there is a trend with Hi Perf V bottom boats to turn the inward given the unusual somewhat elevated installation height. Turning inward proponents feel that a litte more top speed is achieved because there is a little more bowlift. The upward (outboard) swinging blade sees more water than the downward (inward) swinging blade because of the bottom dead rise masking off more water as you approach the keel. The greater push upward results in a down force at the prop which results in bowlift. Some also fee that a little better control comes with turning inward.
Cheeers, Toffen G - Norway :2purples: