Each tank has an individual gauge. I often mow till one tank is out of fuel. It doesn't hurt anything. Besides, most of those fuel gauges don't last very long.So what do you do, mow until you run out of fuel and then switch the valve and start it back up? How does your fuel gauge work then? Or are there individual gauges for each tank?
I just took the test and didn't go to the class, My first time taking,and passing the Briggs MST test back when it was a 4.5 hour 300 and some question test with a 80% first time failure rate. That test got me out of the 4 day Briggs school. And a nasty Briggs field rep that didn't give me any crap after that.Or you work for a company two years repairing equipment before they even send you to school on the equipment. Then you probably know more about the equipment then the guy teaching the class. I have just went to sleep during the classes and still pass the tests.
Hope the fuel filter caught the debris you blew out.Finally got it fixed without taking it to the dealer. I backed the mower up to my shop and left it running. I grabbed my air hose with the blow gun attachment. Got an old T-shirt and stuffed it into the mouth of the filler neck around the nozzle and blasted the tank with air with the mower running at half throttle. Whatever had it stopped up was flushed out. Surprisingly, the fuel level has equalized in both tanks.