help with engine
 

I have a question. Hope this is in correct forum.

I am running a tower 61 engine in my new tower uproar 60 fun fly plane. THe engine was already broken in using my trainer, so I know that it runs great. I have been having problems since I transferred it over to the uproar.

When I fly the uproar around upright and very tamely, it runs fine. As soon as I start doing loops, inverted, spins, etc, etc---- it will die. It seems to die after about 5 minutes into the run. THe engine is definately not too lean. It seems that this is a fuel problem since it happens mainly when I am inverted or looping.

I have already taken the fuel tank apart several times. THere are no leaks and the clunk travels freely around the inside of the tank without getting hung up. It is a dubro tank. I am not sure what else to try at this point. ANy suggestions out there. If not, what other info can i provide you guys to help me out?
THanks,

RE: help with engine
 

Make sure the klunk line hasn't pulled off the brass tube at the front of the tank. Also make sure it doesn't have a hole or air leak at that connection, because it will sure suck air rather than fuel if given the chance. Also make sure your tank center line is roughly in line with the carb spray bar.

Clair