i just ordered the Maretron equipment to get fuel flow numbers from the Yanmar 6LPA's as they don't have that ability from Yanmar. I will know for sure what the numbers are after I install them. I am averaging per tankful between 2 and 2.2 mpg, but I have only filled with 3 times in 140 hrs of use!

Going by boost numbers i think I am getting around 2.5mpg at 38MPH, the grip of the Maximus is incredible but they are hard on the drives and motors, to run the same speed with 26 bravos I'm turning 200 more RPM but the boost is 2 psi lower.

My best slip with the maximus is 7.9% @ 53mph 24PSI of boost around 9% at 38mph, with the bravos it is 16.6% @ 52mph 21.5psi of boost around 23% at 38mph, full tanks in both cases 314 gallons.

I have spreadsheets with all the numbers pm me your email and i'll send them to you.

I am going to try labbed bravo 30P and hydromotive P5 28p this weekend and see how they do, so far all the props I have tested I can rev to 3850, so i want to try some props that will tell me what the motors are really capable of.

The official WOT is 3800 but you are supposed to be set up light to reach 4000, but I think these second generation 6LPA's have a governor or something holding the revs to 3850.

I think these are realistic MPG numbers with the Bravo's with full tanks and water.

26p Bravo 1 untouched 10 knot SSE wind 85 degrees humid, 6-25-11
RPM MPH Slip Boost P Boost S GPH MPG Range
650 5.5 48.4% 1 1 0.5 11.00 3113
700 6 47.8% 1 1 1.2 5.00 1415
800 6.6 49.7% 1 1 1.9 3.47 983
900 7.2 51.3% 1 1 2.6 2.77 784
1000 7.7 53.1% 1 1 3.3 2.33 660
1100 8.5 52.9% 1 1 4 2.13 601
1200 9 54.3% 1 1 4.7 1.91 542
1300 9.5 55.5% 1 1 5.4 1.76 498
1400 9.8 57.4% 1 1 6.1 1.61 455
1500 10 59.4% 1 1 6.8 1.47 416
1600 10 61.9% 1 1 7.5 1.33 377
1700 10.8 61.3% 1 1 8.2 1.32 373
1800 12.8 56.7% 1 1 8.9 1.44 407
1900 14 55.1% 1 2 9.6 1.46 413
2000 18 45.2% 1 3 10.3 1.75 495
2100 20 42.0% 4 4 10.6 1.89 534
2200 23 36.3% 5 5.5 10.9 2.11 597
2300 25 33.8% 5 5.5 11.2 2.23 632
2400 27 31.5% 7 6 11.6 2.33 659
2500 30 26.9% 8 6 11.9 2.52 713
2600 32 25.0% 8 7 11.5 2.78 787
2700 33.5 24.4% 9 9 12.35 2.71 768
2800 34.5 24.9% 9 10 13.8 2.50 708
2900 36 24.4% 10 10 15 2.40 679
3000 38 22.8% 11 10 15.3 2.48 703
3100 40.5 20.4% 12.5 11.5 16.5 2.45 695
3200 42.5 19.1% 14 14 17.8 2.39 676
3300 44 18.8% 14 14 19 2.32 655
3400 46 17.6% 16.5 16 20.1 2.29 648
3500 47 18.2% 18 18 21.4 2.20 622
3600 49 17.1% 19.5 19 24.6 1.99 564
3700 50.5 16.8% 21 21 27.8 1.82 514
3800 52 16.6% 21.5 21.5 31 1.68 475

the best mpg is at 2600 rpm which by no coincidence is the torque peak

Priceless that is awesome I'm still laughing out loud