THE FOLLOWING DATA IS COURTESY OF HUNTER NEBLETT WHO RUNS HIS 22' MARQUESAS WITH A YAMAHA 115 (4-Stroke) OUT OF BAYOU VISTA, TEXAS.
Load
Trip
MPG
Gallons Burned
Daily Mileage
2 men, ice, gear
34.5 miles offshore, mostly bottom fishing
4.9
26
129
2 men, ice, gear
Trolled and bottom fished; 28.7 miles offshore
4.9
24
118.5
2 men, ice, gear
Bottom fished 34.5m offshore
5.5
25
138
3 men,1 boy, ice, gear
Ran 46 miles each way, trolled at 8 MPH all day.
4.6
30
140
Solo, ice, gear
Ran 46 miles each way, trolled at 8 MPH all day;
6.6
23
153
Mr. Neblett reports that with a normal load he typically gets about 7 miles per gallon at 21 MPH, 5.75 MPG at 29 MPH, and 4.6 MPG at 30 knots, turning about 4900 RPM. At 38 MPH his engine burns 8 gallons per hour which is 4.75 MPG.