25hp 2 stroke tohatsu on the back of a honwave t40 sib with an aluminium floor. Would be looking for mainly top speed performance. Usually only has a relatively light load of around 100-130kg including me and fishing gear.
At WOT I am getting 23.5 knots. This weekend coming I am uprating it to a 30hp by changing the restricter between the carb and the block, the gasket only alows for around 70% air flow into the head. So I am hoping to gain 2-2.5 knots from that.
Don't know how much performance I can get from changing the prop. I don't even know if I need a smaller or larger prop