Thanks for the prop info Troy. I will try the 15-8 and see how that works. By the way I am in Oregon flying at about 150 feet above sea level. Right now temps ar in the 70's ,maby the heaver pitch prop will be the ticket when the air gets hotter and thinner. I had a feeling that the YS wanted to run a little higher rpm than i was running it. I also had a lean condition on my last flight. It was due to the YS two piece check valve getting loose and losing tank pressure. Replaced it with a one piece valve as it is inside the cowl and a little hard to get to without removing the cowl. Also just as info to some of the others it is a good idea to use small zip ties or some type of clamp on all of the connections to avoid leaks. Saves on dead stick landings! thats probably a givin to most people but i just thought i would throw it out there.

....Dan