150 hp performance

[glt]

Building a 71 flatback and planning on a F150 Yamaha. just curious what kind of numbers I can expect to get out of it?

 Thanks

[Aswaff400]

expect around 42mph top end, with a 28-30 mph best cruise, should get between 4.5-5 mpg at cruise.

[glt]

 Can you tell me which prop you are running?

 Thanks

[Aswaff400]

im running a 21p revolution 4. for a 150hp motor, i think a 17p is a good start. i believe captain matt is running a 17p enertia eco with his mercury 150 4s. i dont think the yamaha can swing the large diameter of the enertia eco.