RE: engine shutting down on take off
Hi hotrod31
When I had a similar problem, I suspected low muffler pressure for pushing the fuel to the carburetor. I went so far as to instal a tubing "tee" at the carburetor fuel inlet, and ran some fuel tubing vertically up, and put some fuel into it. In this way I was able to record the number of inches of fuel pressure I was getting from one engine, and compare it to another engine that was running well. Every fuel threaded connection in the fuel system must be sealed with Loctite. I also use high temp silicone sealant on the muffler flange connection along with the bearing surface of the muffler thru bolt head.