Suzuki DF350 #'s

[castnetcracker]

So I'm almost finished with the first 10 hrs on the engine and figured i'd post up some performance numbers on the Boat/Engine. I'm very happy with the performance of this engine and the 23 seacraft. I hadn't ever ran one before i pushed mine off the trailer and fired up the engine. I think it may benefit from raising the engine up to the last hole on the bracket and may need to go up a prop size after the rings fully seat but I really dont think it's worth the expense of 2 new props for a small gain.

1979 23' SF - Suzuki DF350A

Prop: 15.5 x 24 duoprop

Mount: Hermco Twin engine bracket mounted 1" higher than instructions (top of platform 27" above keel)

Fuel - 90 Gallons (104 gal tank) 90 Octane ethanol free

Weather: Glass calm conditions, 90 degrees

5 adults and minimal gear, T-top installed


3300 RPM - 30 MPH - 7.93 GPH - 3.8 MPG
3900 RPM - 36 MPH - 10.3 GPH - 3.5 MPG
4600 RPM - 43 MPH - 15.0 GPH - 2.9 MPG
6300 RPM - 59 MPH - 29.8 GPH - 2.0 MPG

Whats interesting, is that with 20 gallons of fuel and only me on board i get the same Max speed of 59 which is what leads me to believe it may need more prop.