I have a TT GP 40 I bought NIB off ebay a month ago and have had one recurring problem with it. It runs just fine for awhile and then just quits. I have tried several different glow plugs and they all run fine until the engine decides to quit. The tank is new and has been checked for bad lines. The engine has been completely torn apart and checked for a defect in the casting or machine work. It is flawless. The carburator has been disassembled and checked. No air leaks or anything to block the fuel flow. The spray bar has been tried at several different depts and it runs anywhere you put it.

It doesn't matter if its leaned out or very rich. There are never any bubbles in the fuel line. I have tried it with the exaust pressure and with out. Same thing. It runs and then quits. I have tried 5 different glow plugs and they all work fine until it decides its through running. It will immediately restart too. The fuel is less than two months old and my other two engines run just fine on it so I doubt its a fuel problem.So I admit I am stumped. Can you guys think of something I have overlooked?