Irecently acquired a USED Hangar 9 Alpha Trainer for my son. It's about 8-9 years old. I'm told it was only flown1 or 2 times and Ibelieve that.The plane and radio are almost like new but the old fuel inside the engine hasvarnished up.I've removed the engine and opened it up todisassemble it for cleaning. But Ican't get the connecting rod out. It's almost like its crimped on or something.I've disassembled several other engines over the years and never ran into anything like this before so I'm just stuck. Any tips??