My lawnmower (20 year old B&S 3.5 HP) won't run if it gets tilted to the right as seen from the pushing-the-mower position. It acts like it's not getting gas. If I tilt it back to the left it starts going again just fine. When tilted to the right the low point of the gas tank would be even lower so I'm sure it's getting gas to the fuel line when it stops. I checked the carb floats and they seem to be functioning properly. The fuel line is new. The fuel flows freely through the line. The air cleaner looks good. I sprayed the carb with carb cleaner. I removed the jet and cleaned it too. I even made sure the gas tank was full. Oil level is just a tad high.
Any ideas? I have to mow hilly areas and it's not always easy to get my approach with the mower tilted just the right way ;-)