my freind has a concept 23 sport fishing boat with a merc 200 outboard. It already throws an alright weight, but do you think fat sacks will make a difference. Thanks, Colin

Definately, adding more weight makes the boat displace more water which makes the wake bigger. The outboard vs I/O vs V-Drive vs Inboard has much less impact on the wake thank the boat hull and weight. I had a 19' SeaRay Outboard that threw a rather nice wake with enough weight in it.