I had a 40 2 stroke on my trainer and even with an experienced pilot he couldn't get it to stop dead sticking, after about 10 tanks of fuel through it I never had a dead stick again, I liked it! Unfortunatly you get what you pay for too, they don't have the power that a lot of the other motors have. Buy an OS and you will not be unhappy! I'm guessing you have a trainer type airplane so the 40 or 46 fx will do you nicely and you can take it off the trainer later and put it on you second or third airplane...just buy the 46 fx 100 even