It will take the weight of that engine,I had a Moki 1.35 which is near the same weight as the SA 150,mine was 8.5 pounds and flew quite well. I did add tri stock to the firewall,landing gear formers. In that heat,you might want to take the cowl off at least for break in,fly only in early AM or late PM. You should have plenty of power to hover & pull out.