RE: G-26 ZENOAH, FLAMES OUT
I will offer my persoanl experience and also agree with PE on the answers he submitted to you.
1st thing I would like to add is to ensure your vent tube is not restricted to your tank. I had mine melt close when it got to close to the muffler and the engine went lean and died.
2nd is. You have got to get the exit open on that cowl. Either dremel it open or buy screens and paint over them on the bottom. General rule of thumb is, they need to be about 50% bigger than your inlets. This will cause a venturi effect and allow the engine more cooling.
Reroute your spark plug wire where it is not metal to metal.
Since you have already "normalized" your carb the engine should not be so tempermental in the air.
My synopsis is that your engine is overheating and dying in the air.
bottom line is more air flow.
My 2 cents worth.
Wish you the best
Glenn Williams