I recorded these values using the video camera in my phone so I could repost them accurately here. All these fuel consumption figures are at steady plane (except for the values at idle) with a 300 Yamaha Off Shore on my Skeeter WX2100.
IDLE = 0.6 GPH (2.5 MPH)
1800 RPM = 5.0 GPH (20 MPH / 4 MPG)
2000 RPM = 5.2 GPH (22 MPH / 4.2 MPG))
2400 RPM = 5.2 GPH (26 MPH / 5 MPG)
2800 RPM = 6.1 GPH (30 MPH / 4.9 MPG)
3000 RPM = 6.6 GPH (32 MPH / 4.8 MPG)
3100 RPM = 7.1 GPH (33 MPH / 4.6 MPG)
3300 RPM = 7.8 GPH (35 MPH / 4.5 MPG)
3500 RPM = 8.1 GPH (37 MPH / 4.6 MPG)
4000 RPM = 11.2 GPH (42 MPH / 3.75 MPG)
4300 RPM = 14.6 GPH (45 MPH / 3.1 MPG)
5900 RPM = 26.1 GPH (60 MPH / 2.3 MPG)
I’ve been thrilled with the fuel consumption on this motor. The mid-range economy from 3000 – 3500 RPMs (32 – 37 MPH) is very impressive to me given the overall size of the boat being pushed. Of course if you want to make a WOT blast down the lake… it will cost you.