My Saito 125 pulls an 7-8 lb plane around great does use the fuel but man the power is awsume on this. My 180 pulls a Sundowner or did lol weight of around 13lbs. was not as fast as I wanted but faster than the pilot. The 125 has a 16x8 Master AirScrew and same on the 180. The 180 on this size plane to me could be bigger, but flew it good and done all i could do just speed was from 84-93 depending on wind and stuff when it came by radar.