propeller for this boat

[ksc]

Hi All
it s my first message in this forum. I will a boat, I added the photos of it here.
specs are;

Lenght: 30 feet
Beam: 9,4 feet
Dry weight; 6850lb
loaded weight: 10400lb

there will be twin new 300 HP Mercury verado V8 fourstroke XXL
This boat has stepped hull design.

I dont care top speed, my aim is to find most economical fuel consumption at 30 miles!

I had only chance to test it with single suzuki df350, it performed 2 mpg at 32 miles.

I read lots of topic in forum and I realized 21 pitch mercury revolution 4 propeller or 22 picth mercury enertia ECO may be what I need, but I m not an expert!
Are these propeller too big fır this boat ?
I am open to every idea, thank you very much for your help.
thank you so much

[KMac]

Hi All
it s my first message in this forum. I will a boat, I added the photos of it here.
specs are;

Lenght: 30 feet
Beam: 9,4 feet
Dry weight; 6850lb
loaded weight: 10400lb

there will be twin new 300 HP Mercury verado V8 fourstroke XXL
This boat has stepped hull design.

I dont care top speed, my aim is to find most economical fuel consumption at 30 miles!

I had only chance to test it with single suzuki df350, it performed 2 mpg at 32 miles.

I read lots of topic in forum and I realized 21 pitch mercury revolution 4 propeller or 22 picth mercury enertia ECO may be what I need, but I m not an expert!
Are these propeller too big fır this boat ?
I am open to every idea, thank you very much for your help.
thank you so much

Ken or Ole will be around shortly to help.. But, that is a very nice boat.. Welcome..

[LFBB]

This one, tests show it's by far the most economical, question is, can you afford it and will it pay for itself over time?


https://www.sharrowmarine.com/

[ken2]

Did this one on Email.
But with 10 people on the boat and very little fuel, they got 45 MPH with a Suzuki DF350
with twin Mercury V8 300's we'd expect about 57/58 MPH, and if your going 1.75 gear ratio, I'd say 19 ECO's.

Another senario was with a 400R, same load as with the Suzuki, I'd expect about 48 MPH with a 400, and I'd go 15 pitch standard Enertia.