If you decide to go pump use the cline regulator. I don't think you need it unless your tank is to far back. My ST 3250 did the same thing. I read on here how to fix it and it worked. I went up one size on the fuel tubing. I also got the next size bigger brass and used it for the tank stopper. I also drilled out the clunk in the tank and the nipple on the carb. Then to be safe I used a zip tie to hold the line on the carb and the clunk on the line in the tank. I have a third fill line that I left with the stock line and brass. This made a big difference on mine. You are basicly increasing the volume not the pressure.


David