I see a lot of the primer air cleaner bases warped here too. Using two gaskets has never worked for me. Now if make wedge gasket out one and glue it to the other in the area of non contact then I get them to work. I start by installing the first gasket and tightening down the base cover. Then I remove it and check for correct contact impression on the gasket. This way I know where the extra wedge gasket needs to be added. If all else fails it is a new air cleaner base and definitely don't over tighten the screws. Over tightening the mounting screws is one of the reason for the base to warp. Heat and age is the others.
Also on the fuel/float bowl gasket issue Briggs used two different gaskets. An 1/16" and an 1/8" gasket. Most repair kits only include the 1/16 gasket. Luckily the 1/8 is not a commonly used one but I keep a few on hand anyway.
And Norm I get jets and nozzles stuck in too here. It is as if they chemicals they add to gasoline is creating Loctite. Some are simply impossible to remove.
