ORIGINAL: nebp40man
Hi, Just signed up for rc universe just so I could respond. I own Four .47's and a couple of the bigger engines. I have used the .47's extensively over the years. They run really well once they're broke in. The guy I fly with is a diehard OS. buyer. The .47's I've had fly circles around the comperable OS. (comperable planes, weight and size)[8D] The only drawback I can say about them is, You can't seem to ever shut them down, even with radio trim all the way down. They will sputter a bit and finally stop. I don't know if the carb barrel is not a tight enough fit or what. Run them a little rich on your flights. I think all 2 strokes tend to lean out on hot days and this can make landings interesting if your engine is not running. Hope this helps, good luck.
You really need to crank the carb down HARD when ( or before you start ) you tighten the retaining bolt.
Also those cardboard red washers they use tend to leak. Remove the nipples and fittings and apply blue locktite around the threads. This helps a lot.
I've had a couple of GMS engines that do this and I've been able to eliminate the problem by doing the above.
Don't forget to check the tightness of ALL of the cap screws. After the first few runs they WILL come loose.
Now if I could only fix the SuperTigre's identical problem so easily! It has a bad airleak around the throttle barrel. ST even put a rubber ring around this area to help but I find it ineffective.