I have a veco 19 with a baffle instead of a muffler on a airboat. I finally got it to start and run (the fuel tank was to low before). Now the problem is, no matter how I adjust the needle, (it has just one) If i take it past approx 1/4 or 1/3 throttle, it will die. I tried to blow on the gas tank vent tube and move the throttle at full, and I was able to get it to run at full throttle with a slight blowing pressure into the tank. I am needing to know what you guys think is the problem. If it had a muffler, I dont think I would have any problems because then it would pressurize the tank, but i dont, so what do i do to fix this? I appreciate your help very much, and I am looking forward to being a part of this forum. I have several airplanes, an airboat, and I had a gas truck (TMAXX) for awhile.

Thanks
Brian =)

I believe the gas tank is right, but just to be sure, I have the line to the carb going into the tank with one of those things to keep the tube at the bottom, and to filter it, and I have one tube that is just a vent (I used to have it on a mufflered engine), I just left it when I switched engines. The reason I changed engines, is the airboat needs approx a 15-25 size engine, and i had a 40 on it!!! LOL It had tons of power, toooo much, and was a little top heavy also.

Thanks again
Brian =)