Yamaha Outboard Fuel Consumption chart: Yamaha 25 hp 2. 50 GPH Yamaha 50 hp 4. 90 GPH Yamaha 70 hp 2stroke 7. 30 GPH Yamaha 90 hp 9. 10 GPH Yamaha 115 hp 9. 70 GPH Yamaha 150 hp 15. 5 GPH Yamaha 175a hp 16. 3 GPH Yamaha 200 hp VMAX HPDI 19. 2 GPH Yamaha 225 hp 17. 7 GPH Yamaha 250 hp 23. 8 GPH Yamaha 300 hp 26. 0 GPH Yamaha 350 hp 34. 1 GPH Portable outboard Yamaha