I tested out a couple props on my Suzuki DF 20A EFI/ Skimmer Skiff 14 (Aged IPB14) and tought I would submit the results as a level of reference for others.
The engine will come stock with an aluminum 10 pitch nine.25″ prop. With two in the boat and equipment, I was finding 24 MPH top pace by GPS with no tabs or hydrofoil. With the 10 pitch prop I occasionally hit the rev limiter and the engine sounded like it was spinning a Good deal of RPMs (I don't have a tach).
I switched to a Solas aluminum eleven pitch…
Suzuki DF20 A EFI (Gas Injected 20hp 4 Stroke) Prop results