1996 300 Fuel consumption

[Mike11000]

I am hoping someone can assist me. I recently bought a 1996 300 Sundancer and am wondering about the fuel consumption. I have twin 5.7l mercruisers 210hp. Any ideas? Thanks. Mike

 

[FireIsland1]

i had this same boat { inboards } burnt 20gal/hr fast cruise.
i later put in 300 mpi's burnt the same but picked up 4kn. in speed.

 

[Mike11000]

Thank you!
That`s great - I was figuring about 15gphéengine but that was a real rough estimate.
Thanks again.
Mike