Out doing some more testing of a 75 HP single carb build we did. We were using a 14 pitch 2 blade and turning around 4500-4700 RPM, which got us up to 38 MPH. Our boat is a 1854 Excel and our drive is a Mudwalker surface drive. Later this week, we will have our new clutch and our 115+ HP engines on the water so we're super excited for that...stay tuned. Follow @l__evel9 on Instagram for more updates.