Hi
I have a week old OS 55AX with a little over half a gallon of fuel through it.
I use it for 3D on a Mojo 40 but it's unusable because it runs very rich from 2/5 through 4/5 of throttle. It even drops rpm from 2/5 to 4/5 of throttle. I can lean it out but then the high end runs way too lean. Looks like a carb problem, maybe the spray bar. Is this a known problem? Send it in or can you send me a new carb?
I broke it in 2 tanks with 12.5% nitro and 20% oil. It's running Power Master 20/20 now. The more prop I use the bigger the problem. With an APC 12.25x3.75 it keeps running, anything bigger and it quits during flight.
Thanks,
Martin

edit: Looking into the carb I see that the spray bar is about 1/16 too short. It already allows maximum fuel flow at around half throttle which explains why it's flooding. Can you send me a new *proper* carb please? This way I don't have to miss a one week old engine for 2 weeks. Thanks!